Dr Yevgen Zadorin est un chercheur en biomédecine dont les travaux s’inscrivent à l’interface de la physiopathologie vasculaire, de la biochimie sanguine, de l’hypertension artérielle pulmonaire et des maladies cardiovasculaires rares. Son parcours scientifique s’est construit autour d’une compréhension approfondie des mécanismes moléculaires, biochimiques et fonctionnels impliqués dans les atteintes vasculaires sévères, en particulier dans l’hypertension artérielle pulmonaire primaire et dans le syndrome d’Eisenmenger. Son activité de recherche a porté sur l’analyse du rôle du système du monoxyde d’azote (NO), du stress oxydatif, des processus de peroxydation lipidique, de l’activité antioxydante sanguine, ainsi que sur l’élaboration d’approches diagnostiques et de perspectives thérapeutiques innovantes destinées à améliorer la prise en charge et la qualité de vie des patients atteints de maladies rares.

L’ensemble de ses travaux s’est développé dans une logique de recherche translationnelle, articulant l’observation clinique, l’analyse biochimique, l’étude des biomarqueurs sanguins et la recherche appliquée à des pathologies vasculaires complexes. Cette démarche scientifique a été nourrie par une expérience de terrain au contact de patients atteints de formes graves d’hypertension pulmonaire, ainsi que par une activité académique consacrée à la mise en évidence de mécanismes physiopathologiques mesurables, susceptibles d’améliorer le diagnostic, le suivi évolutif et l’évaluation de stratégies thérapeutiques.

Au cœur de ses recherches figurent l’hypertension artérielle pulmonaire primaire et le syndrome d’Eisenmenger, deux pathologies rares caractérisées par des altérations hémodynamiques profondes, un remodelage vasculaire progressif, une dysfonction endothéliale importante et des anomalies biologiques systémiques. Dans ces affections, le déséquilibre entre facteurs vasodilatateurs et vasoconstricteurs, la perturbation du métabolisme du monoxyde d’azote, l’activation des processus radicalaires libres et l’intensification de la peroxydation lipidique contribuent de manière déterminante à la progression de la maladie. Les travaux de Dr Yevgen Zadorin ont précisément cherché à analyser ces mécanismes en se fondant sur l’étude du sang des patients, dans le but de relier des paramètres biologiques objectivables à l’état clinique, à la sévérité de la maladie et à la réponse aux traitements.

L’étude du système du monoxyde d’azote (NO) a occupé une place centrale dans cette activité scientifique. Le NO représente un médiateur majeur de la régulation vasculaire, intervenant dans la modulation du tonus vasculaire, dans la fonction endothéliale, dans l’agrégation plaquettaire et dans de nombreux processus physiopathologiques impliqués dans les maladies vasculaires. Dans le cadre de l’hypertension pulmonaire, l’altération de ce système contribue à la vasoconstriction, au remodelage vasculaire et à l’aggravation de l’insuffisance circulatoire. Les recherches menées ont cherché à caractériser les modifications du système NO dans le sang et dans les érythrocytes de patients atteints d’hypertension artérielle pulmonaire, ainsi qu’à en évaluer l’évolution sous l’effet de certaines approches thérapeutiques, notamment les inhibiteurs des canaux calciques. Ces travaux ont contribué à approfondir la compréhension des mécanismes biochimiques associés à l’hypertension pulmonaire et à mettre en évidence des corrélations entre les marqueurs du système NO et les manifestations de la maladie.

Le stress oxydatif et les processus de peroxydation lipidique constituent un second axe majeur de cette recherche. Dans les pathologies vasculaires rares, l’excès de production d’espèces réactives et l’insuffisance relative des systèmes antioxydants participent à l’agression de l’endothélium, à l’altération des membranes cellulaires et à la progression du dommage vasculaire. L’analyse de la peroxydation lipidique dans le sang de patients atteints d’hypertension artérielle pulmonaire primaire ou de syndrome d’Eisenmenger a permis de documenter l’intensité des phénomènes d’oxydation au cours de ces maladies. Les travaux consacrés aux processus radicalaires libres ont mis en évidence l’intérêt de certains paramètres biochimiques comme indicateurs de l’état vasculaire et de l’évolution pathologique. Dans cette perspective, l’étude des systèmes antioxydants, des acides gras et de la composition lipidique a constitué un volet important de la recherche, ouvrant la voie à une meilleure compréhension du rôle des déséquilibres métaboliques dans les maladies cardiovasculaires rares.

Le syndrome d’Eisenmenger a représenté un domaine d’intérêt particulier. Cette pathologie complexe, située au carrefour de la cardiologie congénitale, de la médecine vasculaire et de la physiopathologie pulmonaire, s’accompagne d’une hypertension pulmonaire sévère liée à des cardiopathies congénitales évoluées. Les travaux de Dr Yevgen Zadorin ont porté sur les mécanismes biochimiques et oxydatifs observés chez les patients atteints de syndrome d’Eisenmenger, ainsi que sur la comparaison de ces profils biologiques avec ceux de patients présentant une hypertension artérielle pulmonaire primaire. Cette approche comparative a permis de préciser des similitudes et des différences dans les processus de peroxydation lipidique, dans la composition en acides gras et dans les marqueurs de dysfonction vasculaire, apportant une contribution utile à la compréhension de ces affections rares et sévères.

Un autre aspect important de cette activité scientifique concerne l’élaboration de méthodes diagnostiques. Au-delà de la simple observation des phénomènes biochimiques, les recherches ont visé à transformer les données biologiques en outils diagnostiques et d’aide à l’évaluation clinique. Cette orientation a conduit au développement d’une méthode de diagnostic de l’hypertension pulmonaire primaire ayant fait l’objet d’un brevet. Cette contribution témoigne d’une volonté constante de relier la recherche fondamentale et l’innovation appliquée, en s’appuyant sur l’analyse de paramètres sanguins pour améliorer l’identification des patients, préciser le phénotype biologique de la maladie et soutenir le raisonnement médical. Le développement de cette approche diagnostique s’inscrit dans une logique de recherche translationnelle fondée sur la pertinence clinique des biomarqueurs et sur leur potentiel d’intégration dans des stratégies de prise en charge plus précoces et plus personnalisées.

Les travaux consacrés aux inhibiteurs des canaux calciques ont constitué un autre axe important. L’étude de l’influence de ces traitements sur l’évolution clinique des différentes formes d’hypertension pulmonaire, ainsi que sur l’état du système NO et sur les processus de peroxydation lipidique, a permis d’aborder la maladie sous un angle thérapeutique et physiopathologique simultanément. Cette démarche a contribué à montrer que l’évaluation biologique fine pouvait accompagner l’analyse de l’effet thérapeutique et fournir des éléments supplémentaires pour comprendre les bénéfices potentiels, les limites et les mécanismes associés à certaines approches pharmacologiques. L’objectif n’était pas uniquement de décrire la maladie, mais aussi d’identifier des leviers d’amélioration du suivi, de l’adaptation des traitements et, à terme, de la qualité de vie des patients atteints de pathologies vasculaires rares.

Le parcours scientifique de Dr Yevgen Zadorin s’est également inscrit dans une dynamique internationale. Dans le cadre de ses activités de recherche, il a participé à un projet de coopération scientifique internationale consacré à l’étude de l’activité antioxydante du sang dans diverses pathologies rares. Cette collaboration impliquait des échanges scientifiques et académiques entre équipes universitaires, avec pour objectif d’améliorer la compréhension de la composante oxydative et antioxydante des maladies cardiovasculaires complexes. Cette expérience a renforcé la dimension comparative et translatoire de ses recherches, tout en consolidant une approche scientifique ouverte aux coopérations internationales et à la circulation des connaissances entre équipes travaillant sur des thématiques connexes.

Au fil du temps, son activité s’est élargie au champ de la régénération vasculaire, de la thérapie cellulaire et de la médecine régénérative. Dans cette perspective, les problématiques abordées dans l’hypertension pulmonaire et les maladies vasculaires rares ont été prolongées par un intérêt pour la réparation de l’endothélium, la restauration fonctionnelle des tissus vasculaires et les stratégies de régénération utilisant des approches cellulaires. Les travaux et projets associés à la thérapie cellulaire et aux mécanismes de régénération endothéliale prolongent logiquement les recherches antérieures sur la dysfonction endothéliale, le stress oxydatif, les biomarqueurs sanguins et les mécanismes de l’atteinte vasculaire. Cette continuité scientifique permet de relier les premières investigations biochimiques et diagnostiques à des perspectives thérapeutiques plus avancées, orientées vers l’innovation et la restauration fonctionnelle.

La question de la régénération endothéliale occupe une place particulièrement importante dans cette évolution. L’endothélium joue un rôle central dans la régulation vasculaire, dans la réponse inflammatoire, dans la perméabilité, dans la signalisation moléculaire et dans l’équilibre entre vasodilatation et vasoconstriction. Sa dysfonction est un élément clé dans l’hypertension artérielle pulmonaire, dans les maladies vasculaires rares et dans de nombreuses pathologies cardiovasculaires. Les approches de médecine régénérative et de thérapie cellulaire visant à soutenir ou restaurer cette fonction endothéliale s’inscrivent donc dans la continuité directe des mécanismes étudiés antérieurement au niveau biochimique. Cette orientation témoigne d’une vision scientifique intégrée, allant des marqueurs sanguins et des mécanismes moléculaires jusqu’aux applications thérapeutiques de nouvelle génération.

La thérapie cellulaire, en tant que champ d’investigation et de développement, s’inscrit ici dans une logique de réponse aux besoins médicaux non couverts des maladies rares vasculaires. Dans des pathologies telles que l’hypertension artérielle pulmonaire ou le syndrome d’Eisenmenger, les traitements conventionnels permettent souvent une stabilisation partielle, mais ne répondent pas à l’ensemble des processus de dégradation vasculaire, de perte fonctionnelle et d’atteinte endothéliale. Les recherches et projets de Dr Yevgen Zadorin dans ce domaine s’orientent vers des stratégies susceptibles de soutenir la régénération, de favoriser la réparation vasculaire et d’améliorer durablement le fonctionnement du système circulatoire. Cette approche s’inscrit dans une vision de biomédecine translationnelle, fondée sur l’association de la compréhension mécanistique, de l’innovation thérapeutique et de l’amélioration de la qualité de vie des patients.

La qualité de vie constitue d’ailleurs un enjeu transversal de l’ensemble de ses travaux. Les maladies vasculaires rares, et en particulier l’hypertension pulmonaire sévère, s’accompagnent d’une limitation fonctionnelle importante, d’une altération progressive des capacités physiques, d’une lourde charge symptomatique et d’un retentissement majeur sur la vie quotidienne. L’amélioration de la prise en charge diagnostique, le développement de méthodes d’évaluation plus sensibles, l’identification de biomarqueurs pertinents et l’exploration de nouvelles pistes thérapeutiques répondent tous, en dernière analyse, à cet objectif clinique et humain : prolonger la survie, améliorer le confort de vie, mieux caractériser les profils de patients et offrir des solutions plus adaptées à l’évolution individuelle de la maladie. Dans cette perspective, la recherche ne se réduit pas à une accumulation de données biologiques, mais s’inscrit dans un effort constant pour relier la science fondamentale aux besoins concrets des patients atteints de maladies rares.

Les publications associées à ce parcours scientifique reflètent cette cohérence thématique. Elles portent sur l’influence des antagonistes des canaux calciques sur la peroxydation lipidique, sur les processus radicalaires libres chez les patients atteints d’hypertension pulmonaire primaire, sur la peroxydation lipidique dans le syndrome d’Eisenmenger, sur l’évaluation comparative de différents profils biochimiques dans les formes sévères d’hypertension pulmonaire, sur les modifications de la composition en acides gras dans certaines pathologies vasculaires, ainsi que sur le système du monoxyde d’azote dans les érythrocytes au cours de l’hypertension pulmonaire et sous traitement. À ces travaux s’ajoutent des communications scientifiques consacrées à l’activité antioxydante, aux vitamines, à la peroxydation lipidique et aux liens entre stress oxydatif et pathologies cardiovasculaires. L’ensemble de ces productions met en évidence une spécialisation forte dans la biochimie des maladies vasculaires rares et dans l’étude de marqueurs sanguins pertinents pour le diagnostic et le suivi.

Sur le plan méthodologique, ce parcours se caractérise par une articulation constante entre observation clinique, travail avec les patients, collecte et analyse d’échantillons sanguins, interprétation physiopathologique et valorisation scientifique. L’expérience acquise dans le suivi de patients atteints de formes rares d’hypertension pulmonaire a permis de relier les résultats de laboratoire à des contextes cliniques concrets, favorisant une lecture intégrée des phénomènes biologiques observés. Cette capacité à articuler les données biochimiques, les besoins diagnostiques et la compréhension des mécanismes de la maladie constitue l’un des traits distinctifs de son activité scientifique.

L’orientation actuelle vers la biomédecine régénérative ne rompt pas avec ce socle, mais le prolonge. La recherche sur la thérapie cellulaire, sur la réparation endothéliale et sur les perspectives de restauration de la fonction vasculaire s’appuie directement sur les connaissances accumulées dans les domaines du monoxyde d’azote, du stress oxydatif, des biomarqueurs sanguins et de la physiopathologie de l’hypertension pulmonaire. Cette continuité scientifique donne à l’ensemble du parcours une cohérence particulière, allant de la caractérisation moléculaire des dysfonctionnements vasculaires à l’exploration de solutions innovantes pour les corriger.

Au total, le parcours scientifique de Dr Yevgen Zadorin se distingue par une spécialisation approfondie dans les maladies vasculaires rares, une expertise solide en biochimie sanguine, une attention constante aux mécanismes du monoxyde d’azote et du stress oxydatif, une expérience dans le développement d’approches diagnostiques, un intérêt marqué pour la régénération endothéliale et la thérapie cellulaire, ainsi qu’une orientation translationnelle tournée vers l’innovation et l’amélioration de la qualité de vie des patients. Son activité scientifique s’inscrit dans une logique de continuité entre recherche fondamentale, biomédecine appliquée, innovation diagnostique et perspectives thérapeutiques dans le domaine des maladies cardiovasculaires rares.

Principaux domaines de travail

• Hypertension artérielle pulmonaire primaire
• Syndrome d’Eisenmenger
• Physiopathologie vasculaire
• Biochimie sanguine
• Système du monoxyde d’azote (NO)
• Stress oxydatif
• Peroxydation lipidique
• Activité antioxydante du sang
• Biomarqueurs sanguins
• Développement de méthodes diagnostiques
• Développement d’approches thérapeutiques innovantes
• Régénération endothéliale
• Thérapie cellulaire
• Médecine régénérative
• Amélioration de la qualité de vie des patients atteints de maladies rares

Chronologie scientifique et thématique

1999–2000
Premières communications scientifiques consacrées à l’activité antioxydante, aux niveaux vitaminiques, à la peroxydation lipidique et à l’activité antioxydante dans les pathologies cardiovasculaires.

2000–2005
Travaux de recherche de niveau doctorat / PhD consacrés à l’hypertension artérielle pulmonaire, au syndrome d’Eisenmenger, au système du monoxyde d’azote (NO), au stress oxydatif, à la peroxydation lipidique, aux biomarqueurs sanguins et au développement d’une approche diagnostique.

2001–2004
Publications sur les antagonistes des canaux calciques, la peroxydation lipidique, les processus radicalaires libres, la composition en acides gras, le système NO dans les érythrocytes et les profils biochimiques comparés des formes rares d’hypertension pulmonaire.

2004
Dépôt / publication d’un brevet portant sur une méthode de diagnostic de l’hypertension pulmonaire primaire.

Période ultérieure
Extension des travaux vers la régénération vasculaire, la réparation endothéliale, la thérapie cellulaire et la médecine régénérative, dans une perspective d’innovation thérapeutique appliquée aux maladies cardiovasculaires rares.

Sélection de publications et travaux scientifiques

Amosova K.M., Konoplova L.F., Zadorin Y.M., Yurzhenko N.M., Gubsky Y.I.
Influence des antagonistes des canaux calciques sur la peroxydation lipidique chez les patients atteints d’hypertension artérielle pulmonaire primaire et du syndrome d’Eisenmenger
Cardiovascular Surgery Journal, 2001.

Amosova K.M., Konoplova L.F., Zadorin Y.M., Yurzhenko N.M., Gubsky Y.I.
Processus radicalaires libres chez les patients atteints d’hypertension artérielle pulmonaire primaire
Practical Medicine, 2002.

Gubsky Y.I., Amosova K.M., Konoplova L.F., Zadorin Y.M.
Processus de peroxydation lipidique dans le sang chez les patients atteints du syndrome d’Eisenmenger
Medical Chemistry, 2003.

Gubsky Y.I., Amosova K.M., Konoplova L.F., Zadorin Y.M., Yurzhenko N.M.
Évaluation comparative de la peroxydation lipidique dans différentes formes d’hypertension artérielle pulmonaire
Medical Chemistry, 2003.

Amosova K.M., Gubsky Y.I., Konoplova L.F., Zadorin Y.M., Bryuzgina T.S.
Modifications de la composition en acides gras chez les patients atteints de pathologies vasculaires
Reports of the National Academy of Sciences of Ukraine, 2004.

Amosova K.M., Gula N.M., Gubsky Y.I., Kotsyuruba A.V., Zadorin Y.M., Konoplova L.F.
Système du monoxyde d’azote (NO) dans les érythrocytes chez les patients atteints d’hypertension artérielle pulmonaire primaire et son évolution sous traitement par diltiazem
Heart and Vessels Journal, 2004.

Zadorin Y.M., Amosova K.M., Konoplova L.F., Gubsky Y.I.
Méthode de diagnostic de l’hypertension artérielle pulmonaire primaire
Brevet ukrainien UA 66281 A, publié le 15.04.2004.

Zadorin Y.M., Mikhailova N.O., Buryak O.O.
Activité antioxydante et niveaux vitaminiques chez les patients atteints de maladies cardiovasculaires
Communication scientifique, 1999.

Zadorin Y.M., Vasinyuk O.O.
Peroxydation lipidique et activité antioxydante dans les pathologies cardiovasculaires
Communication scientifique, 2000.

Amosova K.M., Konoplova L.F., Zadorin Y.M.
Antagonistes des canaux calciques et stress oxydatif dans l’hypertension artérielle pulmonaire
Communication scientifique, 2001.

Introduction
Just a few decades ago, the word “antioxidants” was known mainly to biochemists and physicians. Today, however, it appears everywhere: on food packaging, in cosmetics advertising, and in blogs about health and longevity. Antioxidants have become a symbol of a “healthy lifestyle” — almost a magical term promising protection against aging, disease, and fatigue.

Modern humans live in conditions that differ sharply from those to which our bodies are evolutionarily adapted. Air pollution, ultraviolet radiation, stress, lack of sleep, and processed food all contribute to what is known as oxidative stress. This is a state in which too many unstable molecules — free radicals — are produced in the body, capable of damaging cells.

Against this backdrop, the idea of “protection from within” has become especially appealing. Antioxidants have come to be seen as an invisible shield that can neutralize harmful processes and preserve health. Scientific studies at the end of the 20th century revealed a link between oxidative stress and a range of chronic diseases — from cardiovascular to neurodegenerative conditions. This only increased interest from both scientists and the general public.

At the same time, the health industry was developing. Manufacturers of food products and supplements quickly adopted scientific terminology and turned it into marketing tools. Berries became “superfoods,” tea a “source of antioxidants,” and vitamins “guardians of youth.” As a result, a powerful информационный шум formed around antioxidants, where real scientific data are often mixed with exaggerations and myths.

That is why today it is important not just to know about antioxidants, but to understand how they actually work.

Introduction

A Brief History of Discovery

What Are Antioxidants

Oxidative Stress

How Antioxidants Work in the Body

Biochemistry in Simple Terms

The Role of Oxygen

Cellular Damage

Types of Antioxidants

Enzymatic and Non-Enzymatic Antioxidants

Key Antioxidants

Minerals and Enzymes

Minerals and Enzymes

Antioxidants and Health

Immune System

Impact on Inflammation

Aging

Cardiovascular Diseases

Antioxidants and Brain Health: Neuroprotection and Cognitive Support

Antioxidants and Skin Health: Protection, Firmness, and Slowing Photoaging

Nutrition and Lifestyle

Foods High in Antioxidants

How to Preserve Antioxidants in Food

Supplements: Are They Necessary?

How to Choose Supplements

Practical Application

Diet and Antioxidants: It’s the Pattern, Not the Product

What the Mediterranean Diet Really Is

Antioxidants as Part of the System

Meat in the Diet: Types, Role, and Balance

Minimizing Oxidative Stress: A Strategy for the Body and Skin

Personalized Approach

Conclusion: Antioxidants and Overall Health

Key Takeaways

Future Research Directions

References

A Brief History of Discovery

The history of antioxidants began long before the term itself appeared. As early as the 19th century, scientists were studying oxidation processes — chemical reactions in which substances interact with oxygen. These reactions play a key role both in non-living nature (for example, the rusting of metals) and in living organisms.

At the beginning of the 20th century, researchers noticed that some substances could slow down oxidation. They were called antioxidants — literally “agents that counteract oxidation.” At first, this concept was used in industry, for example to prevent food spoilage.

Gradually, scientists’ attention shifted to biology. In the 1930s–1940s, vitamins with antioxidant properties were discovered, such as vitamin C and vitamin E. It became clear that they not only participate in metabolism but also protect cells from damage.

A real breakthrough came in the second half of the 20th century, when the free radical theory was formulated. One of the key researchers in this field was Denham Harman, who in the 1950s proposed that aging is linked to the accumulation of damage caused by free radicals.

This idea had a major impact on the science of aging and health. Scientists began actively studying how antioxidants could slow these processes. In the following decades, numerous antioxidant systems in the body were discovered, including enzymes and molecules such as glutathione.

By the late 20th and early 21st centuries, antioxidant research had become one of the fastest-growing areas of biomedicine. However, alongside scientific progress came many oversimplifications. Complex biochemical processes were often reduced to a simple formula: “free radicals are bad, antioxidants are good.”

Modern science presents a more complex picture. Free radicals are not only harmful but also necessary for normal bodily function, and antioxidants are not a universal cure but part of a finely balanced system.

We will help clarify where the boundary lies between scientific facts and popular myths — and how to use knowledge about antioxidants to benefit your health.

What Are Antioxidants
Free Radicals: A Simple Explanation

To understand what antioxidants are, we first need to get acquainted with their “opponents” — free radicals.

A free radical is a molecule or atom with an “incomplete” structure. It is missing one electron, which makes it highly unstable. Imagine a person missing a crucial part in a mechanism — they would try to find it as quickly as possible. A free radical behaves in much the same way: it attempts to “steal” the missing electron from other molecules.

This is where the problem lies.

When a free radical takes an electron from a neighboring molecule, it damages it. But the process does not stop there. The damaged molecule can itself turn into a new free radical. A chain reaction begins, gradually spreading throughout the cell.

Such reactions can affect:

• cell membranes
• proteins
• DNA

Free radicals are constantly formed in the body — and this is normal. They arise as a result of breathing, immune system activity, and metabolism. Moreover, in small amounts they are even beneficial: they help defend against bacteria and participate in cell signaling.

The problem begins when their numbers become too high.

Oxidative Stress

When the number of free radicals exceeds the body’s ability to neutralize them, a condition known as oxidative stress occurs.

This is not a one-time event, but a gradual process. Imagine a city where garbage is collected regularly — everything works fine. But if the amount of waste increases too much or the cleanup system starts to fail, the city gradually becomes polluted. The same thing happens in cells.

Oxidative stress can lead to:
• damage to cellular structures
• accelerated aging
• development of chronic diseases

This condition is associated with many processes in the body, including:
• cardiovascular diseases
• inflammatory responses
• neurodegenerative changes

However, it is important to understand: oxidative stress is not an “enemy” that must be completely eliminated. It is a signal of imbalance. The body needs both free radicals and mechanisms to control them.

Health is not the absence of oxidation, but its balance.

How Antioxidants Work in the Body

Antioxidants are substances that can neutralize free radicals and interrupt chain reactions of damage.

The main principle of their action is quite elegant.

An antioxidant can “donate” its electron to a free radical without becoming unstable itself. In other words, it sacrifices part of itself to stop the destructive process. Unlike ordinary molecules, antioxidants are structured in such a way that after donating an electron, they remain relatively stable.

In this way, they:
• stop chain reactions
• protect cellular structures
• help maintain balance in the body

But this is only part of the system.

The body does not rely solely on antioxidants from food. We have our own powerful defense mechanisms:
• enzymes (such as superoxide dismutase)
• molecules like glutathione
• systems for repairing damaged cells

Dietary antioxidants only complement this internal defense.

And here lies an important point: more does not mean better. Excessive amounts of antioxidants, especially in the form of supplements, can disrupt the natural balance and even interfere with normal processes in the body.

In the end, antioxidants are not a “miracle cure,” but part of a complex regulatory system. Their role is not to completely eliminate free radicals, but to keep them under control.

It is this balance between damage and protection that lies at the foundation of health.

Biochemistry in Simple Terms
Oxidation and Reduction

At the core of how antioxidants work lies one of the most fundamental processes in chemistry and biology — oxidation and reduction reactions.

In simple terms, it all comes down to the exchange of electrons.
• Oxidation is the loss of an electron
• Reduction is the gain of an electron

These processes always occur together: if one molecule loses an electron, another must gain it.

In the body, such reactions happen constantly. They are the foundation of:
• energy production
• molecule synthesis
• cellular function

Oxygen plays a key role here. It is one of the most “electron-hungry” elements, so it активно participates in oxidation reactions. This is precisely what allows us to extract energy from food.

But this system has a side effect.

During electron transfer, some oxygen molecules are converted into so-called reactive oxygen species (ROS). These are the very free radicals or closely related molecules. They are formed as a result of normal biochemical reactions, especially in the mitochondria — the “power plants” of the cell.

Important: oxidation is not a “bad” process. Without it, life would be impossible. The problem arises only when control over these reactions is lost.

The Role of Oxygen

Oxygen is a paradoxical element. On one hand, it is essential for life. On the other, it is also a source of potential damage.

When we breathe, oxygen takes part in cellular respiration, a process that produces energy (ATP). However, a small portion of oxygen (estimated at a few percent) is converted into reactive forms — highly active molecules.

These include:
• superoxide
• hydrogen peroxide
• hydroxyl radical

These molecules are highly reactive. They easily enter into chemical reactions and can “attack” surrounding structures.

From a scientific perspective, this is explained by oxygen’s ability to accept electrons, forming intermediate unstable forms. This is what makes it both vital and potentially harmful.

However, it is important to emphasize: the body does not simply “suffer” from oxygen. It actively uses these reactive molecules:
• to destroy bacteria by immune cells
• for signaling within cells
• to regulate genes and enzymes

In other words, oxygen is not an enemy, but a tool. Everything depends on balance.

Cellular Damage

When reactive oxygen species become too abundant, they begin to damage cellular structures. This process lies at the core of oxidative stress.

Three types of molecules are particularly vulnerable:

Lipids (fats)

Free radicals attack cell membranes, causing what is known as lipid peroxidation. This disrupts the integrity of the cell and its ability to control what enters and exits.

Proteins
Damage to proteins can alter their structure and function. This affects enzymes, receptors, and the cell’s transport systems.

DNA
The most critical consequence is damage to genetic material. This can lead to mutations and malfunctions in cellular processes.

Scientific reviews show that oxidative stress is associated with damage to these key components — lipids, proteins, and nucleic acids.

If damage accumulates, two scenarios are possible:
• the cell “self-destructs” (apoptosis)
• or it continues to function incorrectly

In the long term, this is linked to the development of many diseases — from cardiovascular to neurodegenerative — as well as to aging processes.

The biochemistry of antioxidants is not an abstract complexity, but a clear and logical system:
• oxygen helps us live
• but in the process, aggressive molecules are formed
• these molecules can damage cells
• the body keeps them in balance using protective systems

Types of Antioxidants

Antioxidants are not a single substance, but an entire defense system consisting of many molecules and mechanisms. To better understand how it works, it is useful to divide antioxidants into several types.

The most convenient classification is by origin and by mechanism of action.

Endogenous (Internal)

Endogenous antioxidants are those produced by the body itself.

They form the foundation of our defense. Without them, a person could not survive, even with perfect nutrition.

Key representatives:
• glutathione
• superoxide dismutase (SOD)
• catalase
• glutathione peroxidase

Glutathione holds a special place — it is often called the “master antioxidant” of the body. It is present in almost all cells and plays a central role in neutralizing reactive oxygen species and regenerating other antioxidants.

Enzymes such as superoxide dismutase and catalase act as highly efficient “cleaning systems.” For example, superoxide dismutase converts aggressive superoxide into a less reactive form, and catalase then breaks it down into water and oxygen.

Research shows that the endogenous antioxidant system is the body’s first line of defense and plays a key role in maintaining cellular balance.

It is important to understand: if this system functions well, the need for external antioxidants is significantly reduced.

Exogenous (From Food)

Exogenous antioxidants enter the body through food.

These include:

Vitamin C

Description: a water-soluble vitamin involved in collagen synthesis and immune regulation. Main effects: a powerful water-soluble antioxidant; neutralizes free radicals; supports immunity and skin health; aids iron absorption from plant foods. Food sources: citrus fruits (oranges, lemons), kiwi, berries, broccoli, sweet peppers.

Vitamin E

Description: a fat-soluble vitamin, mainly represented by tocopherols. Main effects: protects cell membranes from oxidative stress; supports skin and immune health; helps reduce inflammation. Food sources: vegetable oils (olive, sunflower), nuts (almonds, hazelnuts), seeds (sunflower, pumpkin), avocado.

Vitamin A

Description: a fat-soluble vitamin found as retinol (animal products) and provitamin A (carotenoids from plants). Main effects: supports vision and skin health; antioxidant activity via carotenoids; supports immunity. Food sources: carrots, pumpkin, sweet potatoes, liver, eggs, dark leafy greens (spinach, kale).

Polyphenols
Description: a large group of plant compounds with antioxidant activity. Main effects: antioxidant action; protection against oxidative stress; reduction of inflammation; support of cardiovascular health; improvement of gut microbiota. Food sources: green and black tea, cocoa, red wine, apples, berries, olives.

Flavonoids
Description: a group of polyphenolic compounds found in vegetables, fruits, berries, tea, and cocoa. Main effects: antioxidant action; anti-inflammatory effects; support of blood vessels and cardiovascular health. Examples: quercetin, epicatechin, catechins, anthocyanins (berries, dark grapes, green tea).

Carotenoids
Description: pigments that give orange, red, and yellow colors to fruits and vegetables (carrots, pumpkin, red peppers, tomatoes). Properties: fat-soluble antioxidants; protect cells from oxidative stress; support eye, skin, and immune health. Main representatives: beta-carotene, lycopene, lutein, zeaxanthin.

Unlike endogenous antioxidants, these are not the foundation of the system, but they play an important supporting role.

Their functions are to:
• support the internal antioxidant system
• “capture” free radicals
• reduce the overall burden on the body

For example, vitamin C can regenerate oxidized vitamin E, restoring it to its active form. This illustrates that antioxidants do not work in isolation, but as part of an interconnected network.

Enzymatic and Non-Enzymatic Antioxidants

Another important way to classify antioxidants is by their mechanism of action.

Enzymatic Antioxidants

These are protein enzymes that accelerate chemical reactions involved in neutralizing free radicals.

They include:

Superoxide dismutase (SOD)

Description: an enzyme naturally produced in the body’s cells. Main effects: neutralizes superoxide radicals (one of the most reactive types of free radicals); prevents damage to DNA, proteins, and cell membranes; works in combination with catalase and glutathione to provide comprehensive cellular protection. Sources: produced within the body; levels can be supported through foods rich in zinc, copper, and manganese (nuts, seeds, whole grains, seafood).

Catalase

Description: an enzyme that breaks down hydrogen peroxide into water and oxygen. Main effects: protects cells from oxidative stress caused by hydrogen peroxide accumulation; supports the function of other antioxidant systems. Sources: synthesized in cells; activity supported by foods such as vegetables (broccoli, spinach) and whole grains.

Glutathione peroxidase

Description: an enzyme that uses glutathione to neutralize lipid peroxides and hydrogen peroxide.
Main effects: prevents lipid oxidation and damage to cell membranes; protects tissues and organs from oxidative stress; important for detoxification and immune function. Sources: synthesized in the body; supported by foods rich in selenium (fish, seafood, nuts, eggs) and sulfur-containing amino acids (garlic, onions, broccoli).

Key features:

• act very quickly

• are highly specific (target particular molecules)

• are continuously produced in the body

For example, superoxide dismutase can neutralize one of the most aggressive radicals — superoxide — in a matter of moments.

Non-Enzymatic Antioxidants

These are molecules that are not enzymes but can directly interact with free radicals.

They include:

• glutathione

• vitamins C and E

• flavonoids

• carotenoids

They work through a different principle: they “donate” their electrons to stabilize free radicals.

Most dietary antioxidants belong to this group.

Scientific reviews show that it is the combination of enzymatic and non-enzymatic defenses that ensures effective control of oxidative stress.

A Unified System

The body’s antioxidant system is not a single mechanism, but a multi-layered defense:
• internal antioxidants — the foundation
• external (from food) — support
• enzymes — fast and precise “tools”
• non-enzymatic substances — flexible additional protection

Antioxidants do not work in isolation, but as a coordinated team. Health depends not on the amount of a single substance, but on the balance of the entire system.

Key Antioxidants
Antioxidant Vitamins

Among all antioxidants, vitamins are the most well-known. They have been extensively studied, are widely present in foods, and play an important role in protecting the body from oxidative stress.

However, it is important to understand: each vitamin works in its own way, in its own “environment,” and often in combination with other substances.

Vitamin C

Vitamin C (ascorbic acid) is one of the most well-known and well-studied antioxidants.

Its key feature is water solubility. This means it works mainly in the body’s fluid environments:
• blood
• intercellular fluid
• the cytoplasm of cells

Main functions:
• neutralizing free radicals
• regenerating other antioxidants (such as vitamin E)
• participating in collagen synthesis
• supporting the immune system

Vitamin C acts as a “first line of defense,” intercepting aggressive molecules before they can damage cells.

Scientific reviews show that vitamin C plays an important role in reducing oxidative damage and supporting immune function.

An interesting point: the human body cannot synthesize vitamin C on its own, so it must be obtained regularly from food.

Vitamin E

Vitamin E is a fat-soluble antioxidant, and this determines its unique role.

It protects:
• cell membranes
• lipids (fats)
• lipoproteins (such as LDL)

When free radicals attack fats in membranes, a chain reaction — lipid peroxidation — begins. Vitamin E can stop this process by essentially embedding itself in the membrane and interrupting the chain reaction.

It is often called the main protector of cell membranes.

Importantly, vitamin E does not work in isolation. After neutralizing a radical, it becomes oxidized itself and must be restored — and this is where vitamin C comes in.

Research shows that vitamin E plays a key role in protecting lipids from oxidation.

Vitamin A and Beta-Carotene

Vitamin A and its precursor beta-carotene belong to the carotenoid group.

Beta-carotene is a plant compound that the body can convert into vitamin A. It is found in brightly colored fruits and vegetables:
• carrots
• pumpkin
• sweet potatoes

Main functions:
• neutralizing free radicals
• protecting cells from damage
• supporting vision
• participating in immune responses

Carotenoids are particularly effective at neutralizing certain forms of reactive oxygen, such as singlet oxygen.

However, there is an important nuance.

Unlike vitamins C and E, beta-carotene in high doses (especially as a supplement) may behave differently. Some large studies have shown that in smokers, high doses of beta-carotene were associated with an increased risk of lung cancer.

This highlights an important idea: antioxidants are not universally “good” — their effects depend on context and dosage.

A Coordinated System

Antioxidant vitamins function as a coordinated system:
• vitamin C protects aqueous environments and regenerates other antioxidants
• vitamin E protects cell membranes and fats
• vitamin A and carotenoids complement protection and help regulate cellular processes

Antioxidant defense is not about a single “super-vitamin,” but about the interaction of different substances, each performing its own role.

It is dietary diversity — not a high dose of one vitamin — that is the key to effective protection of the body.

Minerals and Enzymes

When people talk about antioxidants, vitamins are usually the first thing that comes to mind. However, without minerals and internal molecules, the body’s defense system simply would not function.

These components are what enable the key antioxidant systems to work.

If vitamins are the “shields,” then minerals and enzymes are the engineers and mechanisms that make protection possible.

Selenium

Selenium is a trace element required in very small amounts, but its importance is hard to overestimate.

Its main role is participation in antioxidant enzymes, especially glutathione peroxidase.

This enzyme:
• neutralizes hydrogen peroxide
• protects cells from oxidative damage
• prevents lipid breakdown

Without selenium, this mechanism simply cannot function.

From a biochemical perspective, selenium is part of the enzyme’s active site — meaning it is literally built into its structure. This makes it an essential element of the antioxidant system.

Research confirms that adequate selenium levels are associated with protection against oxidative stress and support of immune function.

However, balance is especially important here:
• deficiency → weakened antioxidant defense
• excess → toxicity

This is a clear example of how in biochemistry “more” does not mean “better.”

Zinc

Zinc is another key trace element involved in antioxidant defense, but it acts differently from selenium.

Rather than directly neutralizing free radicals, it:
• stabilizes cell membranes
• protects proteins and DNA
• participates in enzyme function

Zinc is part of the enzyme superoxide dismutase (SOD), one of the most important antioxidant enzymes.

It also plays a role in regulating inflammation and immune responses.

Scientific data show that zinc deficiency is associated with increased oxidative stress and impaired immune function.

Interestingly, zinc can also help protect molecules from oxidation by displacing more reactive metals (such as iron and copper), which can promote the formation of free radicals.

Glutathione

Glutathione is one of the most important molecules in the body’s antioxidant system.

Unlike vitamins and minerals, it is synthesized داخل cells. It consists of three amino acids and is present in almost all tissues.

It is often called the “master antioxidant” — and for good reason.

Main functions of glutathione:
• neutralizing free radicals
• participating in detoxification
• regenerating other antioxidants
• supporting immune function

Glutathione exists in two forms:
• reduced (active)
• oxidized

Its ability to switch between these forms makes it a powerful protective tool.

It acts as a “universal buffer,” maintaining balance within the cell.

Scientific reviews show that glutathione plays a central role in controlling oxidative stress and protecting cells from damage.

Foundation of the System

Minerals and internal antioxidants form the foundation of the body’s defense system:
• selenium — enables the function of key enzymes
• zinc — stabilizes cells and supports enzyme systems
• glutathione — the central element connecting the entire system

Antioxidant protection is not only about what we eat, but also about how the body itself functions. And it is these internal mechanisms — not supplements — that play the decisive role in maintaining balance.

Minerals and Enzymes

When people talk about antioxidants, vitamins are usually the first things that come to mind. However, without minerals and internal molecules, the body’s defense system simply would not function.

These components are what enable the key antioxidant systems to work.

If vitamins are the “shields,” then minerals and enzymes are the engineers and mechanisms that make protection possible.

Selenium

Selenium is a trace element required in very small amounts, but its importance is hard to overestimate.

Its main role is participation in antioxidant enzymes, especially glutathione peroxidase.

This enzyme:
• neutralizes hydrogen peroxide
• protects cells from oxidative damage
• prevents lipid breakdown

Without selenium, this mechanism simply cannot function.

From a biochemical perspective, selenium is part of the enzyme’s active site — meaning it is literally built into its structure. This makes it an essential element of the antioxidant system.

Research confirms that adequate selenium levels are associated with protection against oxidative stress and support of immune function.

However, balance is especially important here:
• deficiency → weakened antioxidant defense
• excess → toxicity

This is a clear example of how in biochemistry, “more” does not mean “better.”

Zinc

Zinc is another key trace element involved in antioxidant defense, but it acts differently from selenium.

Rather than directly neutralizing free radicals, it:
• stabilizes cell membranes
• protects proteins and DNA
• participates in enzyme function

Zinc is part of the enzyme superoxide dismutase (SOD), one of the most important antioxidant enzymes.

It also plays a role in regulating inflammation and immune responses.

Scientific data show that zinc deficiency is associated with increased oxidative stress and impaired immune function.

Interestingly, zinc can also help protect molecules from oxidation by displacing more reactive metals (such as iron and copper), which can otherwise promote the formation of free radicals.

Glutathione

Glutathione is one of the most important molecules in the body’s antioxidant system.

Unlike vitamins and minerals, it is synthesized inside cells. It consists of three amino acids and is present in almost all tissues.

It is often called the “master antioxidant” — and for good reason.

Main functions of glutathione:
• neutralizing free radicals
• participating in detoxification
• regenerating other antioxidants
• supporting immune function

Glutathione exists in two forms:
• reduced (active)
• oxidized

Its ability to switch between these forms makes it a powerful protective tool.

It acts as a “universal buffer,” maintaining balance within the cell.

Scientific reviews show that glutathione plays a central role in controlling oxidative stress and protecting cells from damage.

Foundation of the System

Minerals and internal antioxidants form the foundation of the body’s defense system:
• selenium — enables the function of key enzymes
• zinc — stabilizes cells and supports enzyme systems
• glutathione — the central element connecting the entire system

Antioxidant protection is not only about what we eat, but also about how the body itself functions. These internal mechanisms — not supplements — play the decisive role in maintaining balance.

Antioxidants and Health

Immune System

The immune system is a complex network of cellular and chemical mechanisms that protects us from bacteria, viruses, and other foreign agents. Unstable molecules, or free radicals, play a dual role: they help destroy pathogens, but in excess, they can damage tissues and promote inflammation. Antioxidants help regulate this balance by neutralizing excess reactive molecules and minimizing collateral damage during the immune response.

Research shows that consuming antioxidant nutrients — such as vitamins C, E, A, selenium, and zinc — is associated with improved immune cell function and reduced susceptibility to infection. These compounds support the activity of neutrophils, macrophages, and adaptive immunity (T and B cells).

A large review indicated that dietary antioxidants modulate susceptibility to infections by affecting immune cell function and reducing oxidative stress.

However, it is important to note that evidence for high-dose supplements is inconsistent. For example, a major Cochrane systematic review involving nearly 300,000 participants found that high-dose antioxidant supplements did not reduce — and in some cases increased — mortality risk, particularly with vitamins A and E, without clear benefits for immunity.

Takeaway: Maintaining a balance of nutrients is important for immune protection, but the effects of supplements can be unpredictable.

Impact on Inflammation

Inflammation is the body’s natural defense mechanism that helps fight infections and repair damaged tissues. However, chronic or excessive inflammation can lead to cellular damage and the development of various diseases.

Antioxidants play a key role in regulating inflammatory processes. They neutralize excess free radicals and reduce oxidative stress, which otherwise amplifies inflammatory responses.

Mechanism of Action:
• Free radicals can activate signaling pathways that stimulate the production of inflammatory molecules such as TNF-α, IL-6, and C-reactive protein.
• Antioxidants reduce oxidative damage, which in turn decreases activation of these signaling pathways.
• Some antioxidants, including vitamins C and E and polyphenols, can directly modulate the activity of enzymes and transcription factors involved in inflammation.

Evidence Base:
• A 2022 meta-analysis showed that vitamins C and E reduce markers of oxidative stress and inflammation.
• A large Cochrane review with nearly 300,000 participants found that high-dose antioxidant supplements do not always improve health and may sometimes have adverse effects.
• Studies confirm that natural antioxidants from foods rich in vitamins and polyphenols are safer and more effective for controlling inflammation.

Antioxidants help balance the inflammatory response, supporting immune function and reducing tissue damage caused by oxidative stress.

Key Point: The effectiveness of antioxidants depends not on high-dose supplements but on a comprehensive approach — diverse nutrition and support of the body’s natural defense mechanisms. Antioxidants are not a “cure-all” for infections, but they support immunity and help limit the side effects of oxidative stress. The most reliable approach is a varied diet rich in vitamins, minerals, and plant-based antioxidants.

Aging

Aging is a natural biological process characterized by the gradual decline of organ and tissue function, accumulation of cellular damage, and increased oxidative stress. Antioxidants play an important role in this process by helping limit cellular damage and maintain biochemical balance.

One of the most well-known theories of aging is the free radical theory (Denham Harman, 1956). According to this theory:

-Cells accumulate damage caused by reactive oxygen species (ROS).

-This damage includes oxidation of proteins, lipids, and DNA.

-Over time, accumulated damage leads to reduced cellular and organ functionality, which manifests as signs of aging.

Other aging theories complement this mechanism:

Mitochondrial theory: Damage to mitochondria increases ROS production.

Telomere theory: Telomere shortening limits cell division, and oxidative stress accelerates this process.

All these models converge on one point: oxidative stress is a key factor in biological aging.

Role of Antioxidants in Aging

Antioxidants help slow aging processes by limiting oxidative damage:

Endogenous antioxidants (glutathione, superoxide dismutase, catalase) protect cells from free radicals.

Exogenous antioxidants (vitamins C, E, carotenoids, polyphenols) support internal defense mechanisms and reduce the accumulation of oxidized molecules.

Scientific Evidence

Polyphenols and flavonoids: Meta-analyses show that regular intake is associated with reduced markers of oxidative damage and inflammation, potentially slowing age-related cellular changes.

Vitamins C and E: Human studies indicate these vitamins help reduce oxidative damage to lipids and proteins, with the most pronounced effects in individuals with inadequate dietary intake.

Glutathione: This central endogenous antioxidant participates in cellular detoxification and supports enzymatic defense systems, which is linked to prolonged cellular functional activity.

Key Takeaways

Antioxidants are essential tools for moderating the aging process:

• They reduce oxidative cellular damage.
• Support internal enzymatic defense systems.
• Work synergistically with nutrients obtained from food.

A diet rich in antioxidant-containing foods, combined with support of the body’s endogenous mechanisms, is the most effective approach to slow biological aging.

Cardiovascular Diseases

Cardiovascular diseases (CVDs) remain one of the leading causes of death worldwide. Major risk factors include high cholesterol levels, hypertension, smoking, vascular inflammation, and oxidative stress. Cholesterol itself is not inherently harmful, but its oxidized form — oxidized LDL (oxLDL) — can damage blood vessel walls and trigger atherosclerosis.

Free radicals oxidize LDL, turning it into a highly reactive factor that attracts immune cells and promotes inflammation. Over time, this leads to the formation of atherosclerotic plaques, narrowing of blood vessels, and increased risk of heart attack or stroke. This is where antioxidants play a crucial protective role.

• Vitamin E protects cellular membrane lipids and LDL from oxidation, reducing potential vascular damage.
• Polyphenols and flavonoids, found in berries, tea, and red wine, not only reduce oxidative damage but also lower vascular inflammation.
• Minerals such as selenium and zinc contribute to enzymatic defense of blood vessels against oxidative stress, supporting the body’s antioxidant systems.

The effectiveness of CVD prevention is greatly enhanced by a comprehensive approach. Diets rich in fruits, vegetables, nuts, whole grains, and polyphenol-rich foods can lower cardiovascular risk by 20–30%. Regular consumption of green tea and berries improves endothelial function and reduces markers of oxidative stress.

International organizations highlight the importance of this approach:

• EFSA recognizes the role of vitamins C, E, A, selenium, and zinc in protecting vascular cells from oxidative stress.
• NIH recommends including a variety of antioxidant-rich foods in the diet to support cardiovascular health.
• WHO emphasizes that consuming sufficient fruits and vegetables is a key component of CVD prevention.

Key takeaway: Antioxidants are not a cure for cardiovascular diseases, but they help limit vascular damage, support endothelial function, and reduce inflammation. The most effective preventive strategy combines a balanced diet, management of risk factors, and support of the body’s natural antioxidant systems.

Antioxidants and Brain Health: Neuroprotection and Cognitive Support

The brain is one of the most energy-demanding organs, using about 20% of the body’s energy, yet it is highly vulnerable to oxidative stress. During metabolism, reactive molecules called free radicals are constantly produced. These molecules can damage neurons, membrane lipids, and proteins, potentially leading to declines in memory, attention, and information processing over time.

Antioxidants play a critical role in neuroprotection, limiting oxidative damage and maintaining optimal brain function. Their effects are evident both in long-term prevention of neurodegenerative processes and in the day-to-day support of memory and attention.

Research shows that endogenous antioxidants (like glutathione, catalase, superoxide dismutase) and dietary antioxidants (vitamins C and E, polyphenols, flavonoids) help neurons maintain integrity and function.

Key Antioxidants for Brain Health

How They Work Together

• Endogenous enzymes protect neurons “from the inside.”
• Vitamins support antioxidant defense in both lipid and aqueous environments.
• Polyphenols and flavonoids enhance neuroplasticity, supporting learning, memory, and information processing.

Practical Recommendations

1. Include berries, citrus fruits, nuts, green tea, and cocoa in your diet.
2. Ensure sufficient intake of fat-soluble vitamins E and A through nuts, seeds, vegetable oils, and leafy greens.
3. Support endogenous antioxidant enzyme synthesis with minerals (zinc, selenium, copper) and sulfur-containing amino acids (garlic, onion, broccoli).

A comprehensive approach combining dietary antioxidants and support for internal defense systems provides both daily cognitive efficiency and long-term neuroprotection against age-related decline.

This systematic integration of antioxidants demonstrates that brain health depends on a network of molecules, not a single “super antioxidant.”

Antioxidants and Skin Health: Protection, Firmness, and Slowing Photoaging

The skin is not just a barrier against the external environment. It reflects the overall state of the body and visibly demonstrates aging processes. One of the main factors causing skin damage is oxidative stress, which is amplified by ultraviolet (UV) radiation. This process is known as photoaging and manifests as wrinkles, pigmentation, and loss of firmness.

Under the influence of sunlight, free radicals form in the skin, damaging collagen, elastin, and cell membrane lipids. This is where antioxidants come into play — substances that neutralize free radicals and support skin health at the cellular level.

Internal Skin Protection Through Nutrition

Research shows that endogenous and dietary antioxidants can reduce photo-damage and oxidative stress in the skin (PubMed):

• Vitamin C: participates in collagen synthesis and reduces markers of oxidative stress and inflammatory molecules.
• Vitamin E: protects cell membrane lipids, enhances the skin’s antioxidant defense, and slows photoaging.
• Polyphenols and flavonoids: from green tea, grapes, and berries protect skin cells from UV-induced damage and stimulate collagen synthesis.

A meta-analysis of clinical studies confirmed that regular consumption of antioxidants through food or supplements reduces markers of photoaging and improves skin protection (PubMed).

External Skin Protection: Cosmetic Use of Antioxidants

Modern cosmetology actively uses antioxidants for topical skin protection. Creams and serums containing vitamins C and E, coenzyme Q10, polyphenols, and plant extracts help to:

• Reduce oxidative damage
• Decrease inflammation
• Improve skin texture and firmness

Clinical studies show:

• Topical vitamin C reduces photo-damage and improves skin texture.
• Combining vitamins C and E enhances the effect due to antioxidant synergy.
• Polyphenols from green tea reduce UV-induced inflammation and protect collagen fibers (PubMed).

Thus, antioxidants work on two levels: internally through nutrition and supplements, and externally via cosmetic products.

Key Antioxidants for Skin Health

Sources: PubMed, EFSA, NIH ODS

Comprehensive Approach

A combined strategy — nutrition + supplements + cosmetics — provides maximum skin protection, slows photoaging, and maintains skin firmness and overall health.

Nutrition and Lifestyle

Foods High in Antioxidants

Antioxidants primarily enter the body through food. A diverse diet provides a wide spectrum of compounds that protect cells from oxidative stress and support immune function, heart health, brain function, and skin health.

The following foods were selected based on the criteria: high antioxidant activity + proven benefits + dietary accessibility, so the information is practical for everyday use.

Top 15 Antioxidant Foods (approximate ORAC values, main antioxidants, and brief health benefits)

Notes:

• ORAC is an experimental measure of a food’s ability to neutralize free radicals.
• High-ORAC foods are not only “strong antioxidants” but also rich in vitamins, minerals, and polyphenols that support the brain, heart, skin, and immunity.
• Practically, combining berries, vegetables, and nuts and consuming antioxidant-rich drinks like green tea and cocoa enhances overall antioxidant protection.

Daily Requirements for Key Antioxidants

Should You Track ORAC or Antioxidant Units?

• ORAC is a laboratory measure, not an official dietary guideline.
• Tracking ORAC is not practical, because bioavailability depends on food form, absorption, and combination with other nutrients.
• Variety matters most: berries, vegetables, nuts, whole grains, and tea naturally provide sufficient antioxidants.

Influence of Age, Weight, and Health Status

• Age: older adults need more antioxidants due to increased oxidative stress.
• Weight & metabolism: individuals with obesity or metabolic disorders may have reduced antioxidant defense; polyphenol-rich foods are especially beneficial.
• Stress, infections, smoking: increase requirements for vitamins C and E.

Conclusion: There’s no need to count every ORAC unit. A diverse diet including key antioxidant-rich foods is sufficient. Supplements are only needed in case of a deficiency confirmed by lab tests.

How to Preserve Antioxidants in Food

Antioxidants are biologically active compounds, and their value depends heavily on how we cook and store foods. Even the most antioxidant-rich berries or vegetables can lose a significant portion of their benefits if processed incorrectly.

Heat can destroy sensitive antioxidants, especially vitamin C and some polyphenols. However, not all compounds are negatively affected—some actually become more bioavailable after gentle heat treatment.

Vitamin C is destroyed by high temperatures and prolonged boiling. For example, boiling broccoli or spinach can cause a 50–70% loss of vitamin C (pubmed.ncbi.nlm.nih.gov).

Carotenoids (beta-carotene, lycopene) become more bioavailable after brief cooking, especially by light steaming or roasting (pubmed.ncbi.nlm.nih.gov).

Flavonoids and polyphenols partially degrade at high heat but are largely preserved with steaming, microwaving, or quick sautéing (pubmed.ncbi.nlm.nih.gov).

Practical tip: To retain the maximum antioxidants, use gentle cooking methods: steaming, light stewing, moderate oven roasting, and minimal heat exposure.

Antioxidants also degrade during long-term storage, and when exposed to air or light:

Berries and fruits rapidly lose vitamin C and anthocyanins at room temperature. Store them in the fridge or freezer, which reduces losses to 10–15% per week (pubmed.ncbi.nlm.nih.gov).

Vegetables are best stored in dark, airtight containers. Chopped vegetables exposed to air lose vitamin C faster.

Nuts and seeds contain vitamin E, which is sensitive to oxidation. Store in dark jars or the refrigerator to prevent rancidity (pubmed.ncbi.nlm.nih.gov).

Antioxidant-rich beverages (tea, juices) are best made fresh or stored in sealed containers in the fridge, avoiding prolonged heating and light exposure.

Practical Table: Preserving Antioxidants

Keys to Maximizing Antioxidant Benefits:

• Cold and dark storage → preserves vitamins and polyphenols
• Brief cooking → minimizes vitamin C loss, enhances carotenoid bioavailability
• Minimize air exposure → prevents oxidation

Supplements: Are They Necessary?

Antioxidants in the form of vitamins, minerals, or polyphenols are widely advertised and available in stores, but their use should be considered scientifically.

Most people obtain enough antioxidants through a balanced diet, including fruits, vegetables, nuts, whole grains, and beverages like tea and cocoa. However, supplements may be useful in certain situations.

Supplements are appropriate when a deficiency is documented, confirmed by lab tests or clinical signs:

Selenium

When supplementation may help:

• Confirmed deficiency in blood tests (low selenium or selenoproteins)
• After severe illness or prolonged stress
• Increased need due to deficiency in other antioxidant systems
• Certain autoimmune thyroid conditions (under medical supervision)

Food sources: Brazil nuts, seeds, seafood
Caution: Excess selenium can cause nausea, hair loss, and liver damage. Upper safe limit for adults: ~400 µg/day (EFSA/NIH). Never exceed without medical supervision.

Vitamin C

When supplementation may help:

• Confirmed deficiency in blood tests (low ascorbic acid)
• After prolonged stress or illness, when antioxidant demand is increased
• Frequent colds, to support immunity
• Chronic smoking or high environmental oxidative stress

Food sources: Citrus fruits, kiwi, berries, bell peppers, broccoli
Caution: Excess can cause diarrhea and abdominal pain. Upper safe limit for adults: ~2000 mg/day (EFSA/NIH). Avoid exceeding without medical advice.

Vitamin E

When supplementation may help:

• Confirmed deficiency in blood tests (low α-tocopherol)
• Conditions with high oxidative stress (e.g., cardiovascular risk)
• After prolonged illness or surgery
• Certain skin or neurological conditions (as prescribed by a doctor)

Food sources: Vegetable oils, nuts, seeds, leafy green vegetables
Caution: Overdose is rare, but very high doses can increase bleeding risk. Upper safe limit for adults: ~300 mg/day (EFSA/NIH).

Zinc

Useful in cases of deficiency, immune problems, or vegetarian diets low in zinc-containing foods.

Evidence:
Meta-analyses show that antioxidant supplements help people with deficiencies improve oxidative stress markers and immune function (pubmed.ncbi.nlm.nih.gov/30718944).

Conclusion:
Supplements are safe only when doses are respected and after evaluating individual needs. For most people, a balanced diet remains the best source of antioxidants.

How to Choose Supplements

If a supplement is truly needed, consider the following criteria:

Scientific Basis – Choose forms proven in research:

• Ascorbate for Vitamin C
  • Alpha-tocopherol for Vitamin E
  • Selenomethionine for Selenium

Dosage – Do not exceed the recommended daily allowance without medical supervision.

Quality Certificates – Ensure supplements are tested for purity and free of heavy metals and pesticides.

Complementary to Diet – Supplements do not replace a balanced diet; they should complement food, not substitute it.

Practical advice: Before taking any antioxidants, get lab tests and discuss the results with a doctor or dietitian.

1) Composition – Specific forms, not vague names

Look for specific compounds on the label, not generic terms:
 Ascorbate or ascorbic acid – for Vitamin C
 Alpha-tocopherol – active form of Vitamin E
 Selenomethionine – preferred form of Selenium
 Zinc picolinate / zinc gluconate – well-absorbed forms
 Green tea extract (with % catechins)
 Grape seed extract (proanthocyanidins)

Avoid labels like “natural antioxidant complex” without specifying compounds or doses.

2) Dosage – Should be clearly indicated

A quality label includes:

• Dose per serving (e.g., 100 mg Vitamin C)
• % of daily value (% NRV / % DV)

If dosage is missing, it’s a red flag.

3) NRV / DV – What they mean

• NRV (Nutrient Reference Value) – EU recommended intake
• DV (Daily Value) – US equivalent

100% NRV/DV means the supplement provides the recommended daily intake.

If >100%, it’s a therapeutic dose and must be justified and safe.

4) Standardization of extracts

For plant extracts, look for standardization:

• Green tea extract standardized to 50% catechins
• Turmeric extract standardized to 95% curcuminoids

Standardization ensures each capsule contains a consistent amount of active compounds.

5) Storage and Shelf Life

 “Store in a cool, dark place”
 “Protect from direct sunlight”

Antioxidants degrade with light and oxygen exposure.

6) Manufacturer and Certificates

Manufacturer:

• Reputable companies with a history of quality
• Professional reviews

Third-party certifications:
 USP (U.S. Pharmacopeia)
 NSF
 Informed Choice / Informed Sport (for athletes)
 GMP (Good Manufacturing Practice)

These indicate the product has been tested for content and absence of toxins/metals.

7) Avoid unproven marketing claims

“Super antioxidant for youth”
“Antioxidants + fat burning”
“100× stronger than Vitamin C”

Such claims lack scientific support and often mask low-quality products.

Example of good labeling

Each capsule contains:
 Vitamin C (ascorbic acid) – 100 mg (125% NRV)
 Vitamin E (alpha-tocopherol) – 12 mg (100% NRV)
 Selenium (selenomethionine) – 55 µg (100% NRV)
 Green tea extract (50% catechins) – 200 mg
Certification: GMP, USP Verified

This is how a quality supplement should be presented.

Practical Conclusion

Supplements make sense only in three cases:

1. Documented deficiency via lab tests
2. Increased need (illness, recovery, age-related changes)
3. Specialist recommendation

In all other cases, the best source of antioxidants is food, not pills.

Practical Application

Diet and Antioxidants: It’s the Pattern, Not the Product

When we talk about antioxidants, the conversation often drifts toward lists: berries, green tea, nuts, “superfoods.” This approach is understandable—it’s simple and gives a sense of control. It seems like health can be assembled piece by piece, by adding a few “right” elements.

However, modern scientific data challenge this oversimplification.

Large epidemiological studies and meta-analyses show that people with the best health outcomes do not simply “eat antioxidants.” They follow specific dietary patterns.

This is why current research emphasizes dietary models rather than individual nutrients—sustainable systems of eating in which the interaction of multiple compounds matters more than any single molecule.

What the Mediterranean Diet Really Is

The most studied dietary pattern is the Mediterranean diet. It’s not a fixed “menu” but a collection of eating habits common in Mediterranean countries.

From a scientific perspective, it is defined by several key features:

• Daily intake of vegetables, fruits, and whole grains
• Regular consumption of legumes and nuts
• Olive oil as the main source of fat
• Moderate consumption of fish
• Limited red meat
• Low proportion of ultra-processed foods (OUP Academic)

This structure naturally leads to a diet high in:

• Antioxidants
• Dietary fiber
• Unsaturated fats

Crucial point: the health effect arises not from one component, but from their combination.

Evidence from Meta-Analyses and Reviews

• Adherence to the Mediterranean diet is associated with about a 20% reduction in all-cause mortality (PubMed)
• Observational studies show a reduced risk of cardiovascular disease and certain cancers (NCBI)
• Improvements are noted in metabolic markers: insulin sensitivity, lipid levels, and inflammation markers (PubMed)

A key nuance: these effects are not always reproducible in isolated clinical trials of single nutrients.

Antioxidants as Part of the System

Within such a diet, antioxidants cease to be “active ingredients” that need to be added. They become a natural consequence of the diet.

Vegetables, fruits, olive oil, nuts—all of these contain dozens of biologically active compounds. Their effects accumulate and are enhanced through interaction.

This phenomenon is called the synergy of dietary components (SpringerLink).

That is why attempts to replace food with supplements often prove ineffective.

What a Balanced Diet Looks Like

Translating scientific principles into practice gives a fairly clear picture.

A diet rich in antioxidants does not require exotic products.
It requires structure.

Basic Principles

• Predominance of plant foods – The main source of diverse biologically active compounds
• Quality fats – Primarily olive oil and nuts
• Regular consumption of fish – Source of omega-3 and anti-inflammatory effects
• Minimum ultra-processed foods – Reduces oxidative stress
• Variety – A key factor influencing metabolic resilience

Example 7-Day Diet

Below is an example menu based on the principles of the Mediterranean diet. This is not a strict plan but an illustration of dietary structure.

What unites these days:

• Constant presence of vegetables
• Variety of protein sources
• Use of plant-based fats
• No overload of processed foods

Meat in the Diet: Types, Role, and Balance

Meat is one of the most discussed components of the diet. From a scientific perspective, it is important to focus not on individual “harmful” or “beneficial” products, but on the type, quantity, and context of consumption.

Red Meat

Includes beef, pork, and lamb. Features:

• Rich in heme iron — an easily absorbed form, important for preventing anemia.
• Contains B vitamins (B12, B6) and high-quality protein.
• Risks are associated with frequency, processing, and cooking methods, not the product itself.

Risks:

• Frequent consumption of processed red meat (sausages, bacon) increases the risk of colorectal cancer and cardiovascular diseases (WHO/IARC, 2015).
• Fatty cuts and high-heat frying → formation of harmful compounds.

Conclusion: Can be included moderately — 1–2 times per week in small portions.

White Meat

Includes poultry (chicken, turkey) and some rabbit cuts.

• Main source of high-quality protein with lower saturated fat.
• Source of B vitamins, selenium, and zinc.
• Scientific data show reduced cardiovascular risk when replacing red meat with white meat (Harvard T.H. Chan School of Public Health).

White meat can be the primary “animal” part of the diet, especially for those at risk of cardiovascular disease.

Pork

• Lean pork is a good source of protein, vitamin B1 (thiamine), and iron.
• Processed pork (sausages, ham, bacon) increases risks.
• Moderate consumption of fresh pork is acceptable once a week, preferably lean cuts and cooking methods without high-heat frying.

Fish

Although not mammalian meat, fish deserves separate mention.

• Fatty fish (salmon, mackerel, sardines, herring) — source of omega-3 fatty acids, which reduce inflammation and support vascular function.
• White fish (cod, hake) — source of protein with minimal fat.
• Recommended 2–3 servings per week (American Heart Association).

Main Rule: Meat is part of the system, not the center of the plate.

• Red meat: 1–2 times/week, small portions (~100–120 g), preferably with vegetables and whole grains.
• White meat: 2–3 times/week, as the main protein source.
• Pork: 1 time/week, lean only, no processed products.
• Fish: 2–3 times/week, mostly fatty fish.

Cooking methods that minimize risks:

• Baking
• Stewing
• Boiling
• Steaming

Limit high-heat frying, especially until crust forms, and smoked products.

Scientific Evidence

Health is determined not by a single product, but by the overall diet:

• Red meat provides iron and protein but increases risks in excess.
• Fish and white meat reduce inflammation and support cardiovascular health.
• Plant sources (legumes, whole grains, vegetables) enhance benefits and provide antioxidants, fiber, and micronutrients.

This combination reflects a balanced approach, consistent with the Mediterranean diet principles, where meat is not excluded but used moderately.

7-Day Balanced Menu: Meat, Fish, and Plant Foods

Key Menu Points

1. Red meat (beef, veal) — 1–2 times/week, small portions.
2. Pork — 1 time/week, lean tenderloin, no processed products.
3. White meat (chicken) — 2–3 times/week.
4. Fish — 2–3 times/week, preferably fatty (salmon, mackerel, sardines).
5. Plant foods — included in every meal: vegetables, fruits, legumes, whole grains, seeds, nuts.
6. Antioxidants are naturally obtained from plant foods.
7. Cooking methods: stewing, baking, boiling, steaming — limit frying and processed products.

Why This Menu is Balanced

• Provides a variety of proteins (animal + plant).
• Supplies iron from multiple sources: heme (beef, pork) and non-heme (legumes, vegetables).
• Supports antioxidant balance through vegetables, fruits, nuts, and whole grains.
• Avoids overloading with processed foods and refined carbs.
• Reflects scientific principles: balance, variety, moderation (PubMed, 2020; WHO, 2015).

Minimizing Oxidative Stress: A Strategy for the Body and Skin

Oxidative stress occurs when the balance between free radicals and the body’s antioxidant defenses is disrupted. In this state, cells begin to be damaged, accelerating aging, impairing brain, heart, and skin function, and increasing the risk of chronic diseases.

Minimizing oxidative stress is not just about supplements or creams. It is a systemic approach that includes nutrition, lifestyle, and external protection.

Key Strategies to Reduce Oxidative Stress

Diverse antioxidant-rich diet: Including fruits, vegetables, nuts, berries, green tea, and cocoa in the diet helps maintain the balance of free radicals and endogenous antioxidant enzymes (glutathione, superoxide dismutase, catalase).

Controlling UV and other external stressors: Using sunscreen, antioxidant serums, and limiting direct sun exposure reduces photoaging and skin damage.

Reducing harmful habits and stress: Smoking, excessive alcohol consumption, and chronic psychological stress increase free radical formation. Avoiding these factors helps minimize oxidative stress.

Moderate physical activity: Regular exercise activates the body’s antioxidant systems, but excessive training without recovery can have the opposite effect.

Supporting endogenous antioxidants: The body produces enzymes that protect cells: superoxide dismutase, catalase, glutathione peroxidase. Their activity depends on sufficient intake of trace elements (zinc, selenium, copper) and sulfur-containing amino acids (garlic, onion, broccoli).

Minimizing Oxidative Stress — Factors and Approaches

Minimizing oxidative stress is a comprehensive strategy that combines proper nutrition, a healthy lifestyle, and external skin protection. This approach not only slows aging processes but also supports optimal brain, heart, and overall body function.

Personalized Approach

Antioxidants are not “one size fits all.” The optimal strategy depends on age, sex, and lifestyle, because the body’s needs and deficiency risks change with these factors.

• Age — with time, the activity of endogenous antioxidant systems decreases.
• Sex — men and women differ in hormonal background and metabolism, affecting needs for vitamins C, E, and carotenoids.
• Lifestyle — smoking, stress, physical activity, diet, and environmental factors increase antioxidant requirements.

Thus, universal “daily values” are limited: focus should be on individual risks and habits.

Antioxidant Recommendations

Age	Sex	Lifestyle	Vitamin C (mg/day)	Vitamin E (mg/day)	Carotenoids (mg/day)	Flavonoids (mg/day)	Example Foods
20–40		Low/Moderate activity	90	15	2–4	200–300	Berries, citrus, spinach, nuts, green tea
20–40		Low/Moderate activity	75	15	2–4	200–300	Berries, oranges, carrots, nuts, green tea
40–60		Moderate activity	90	15	3–5	300–400	Carrots, red peppers, broccoli, nuts, green tea
40–60		Moderate activity	75	15	3–5	250–350	Carrots, spinach, berries, nuts
60+		Moderate activity	85–100	15–20	4–6	350–500	Berries, pomegranate, broccoli, nuts, fatty fish
60+		Moderate activity	85–100	15–20	4–6	350–500	Berries, broccoli, spinach, nuts, fatty fish
Any	Smoker	Any activity level	+30–50% of norm	15	4–6	400–500	Citrus, berries, vegetables, green tea
Any	Active athlete	High activity	100	15–20	4–6	400–600	Berries, vegetables, nuts, whole grains

Sources: NIH Office of Dietary Supplements, [PubMed, 2020], Harvard T.H. Chan School of Public Health

Antioxidants are an individual tool; optimal levels depend on age, sex, and lifestyle.

• A balanced diet works better than high-dose supplements.
• Smoking, physical activity, and chronic illnesses must be considered.
• Diet principles: variety of plant foods, quality proteins and fats, moderate meat and fish intake.

This approach helps maintain antioxidant balance and reduces the risk of oxidative stress.

Conclusion: Antioxidants and Overall Health

Key Takeaways

Antioxidants are a system, not isolated compounds. The body requires harmonious interaction between endogenous enzymes (superoxide dismutase, catalase, glutathione peroxidase) and exogenous antioxidants from food (vitamins C, E, carotenoids, flavonoids, polyphenols). Only a comprehensive approach ensures protection of brain, skin, heart, and other organs.

Individualized approach is crucial. Age, sex, lifestyle, UV exposure, and stress all determine the body’s antioxidant needs. Universal recommendations are rarely as effective as personalized strategies.

Nutrition is the primary tool. A balanced diet with a variety of fruits, vegetables, berries, nuts, fish, and whole grains supports antioxidant defense, slows aging processes, and improves cognitive function.

Cosmetics and supplements are supportive. Creams and serums containing vitamins C and E, coenzyme Q10, polyphenols, and flavonoids enhance the body’s internal skin defense mechanisms, reducing photoaging and maintaining firmness.

Balance is more important than maximum intake. Excessive antioxidant supplementation can disrupt cellular signaling and increase oxidative stress. The principle of balance, variety, and consistency remains key.

Future Research Directions

New natural sources

Scientists are exploring microorganisms, fungi, and lichens as new sources of potent antioxidants, potentially forming the basis of the next generation of nutraceuticals and cosmetic products (DOAJ).

Delivery technologies and stability

Development of nanotechnologies, liposomes, and other delivery systems improves absorption of antioxidants and their penetration into cells and deep skin layers (MDPI).

Synergy and combinations of antioxidants

Future studies focus on combinations of vitamins, carotenoids, and polyphenols that may act together and enhance each other’s effects (MDPI).

Mechanisms of aging and neuroprotection

Compounds affecting neuroplasticity and slowing age-related brain changes, including the carotenoid astaxanthin and polyphenols, are under active investigation (PubMed).

Antioxidants in chronic diseases

Emerging research highlights the potential of antioxidants in the prevention and therapy of cardiovascular disease, diabetes, and other chronic conditions (AYU).

Antioxidants are not just “supplements” or “anti-aging creams.” They represent a systemic protection strategy that includes nutrition, lifestyle, endogenous enzymes, and cosmetic support. Proper balance, variety, and consistency are key to protecting cells, slowing aging, and maintaining brain, skin, and heart health.

References

·  Harman, D. (1956). The free radical theory of aging. Archives of Biochemistry and Biophysics, 65(1), 54–61. https://doi.org/10.1016/0003-9861(56)90314-0

·  Lobo, V., Patil, A., Phatak, A., & Chandra, N. (2010). Free radicals, antioxidants and functional foods: Impact on human health. Pharmacognosy Reviews, 4(8), 118–126. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3249911/

·  Halliwell, B., & Gutteridge, J. M. C. (2015). Antioxidants: Mechanisms and functions (4th ed.). Oxford University Press.

·  EberleinKönig, B., Przybilla, B., & Ring, J. (2005). Photoprotection by antioxidants: vitamin C and E. Journal of Investigative Dermatology Symposium Proceedings, 10(1), 73–76. https://pubmed.ncbi.nlm.nih.gov/17134414/ 

·  Pullar, J. M., Carr, A. C., & Vissers, M. C. M. (2017). The roles of vitamin C in skin health. Nutrients, 9(8), 866. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5579659/ 

·  Katiyar, S. K., & Mukhtar, H. (2013). Green tea polyphenols: skin photoprotection and chemoprevention. Archives of Dermatological Research, 305(6), 451–463. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3789494/ 

·  Spencer, J. P. (2008). Flavonoids and brain health: multiple effects underpinned by common mechanisms. Genes & Nutrition, 3(3–4), 243–250. https://pubmed.ncbi.nlm.nih.gov/34355664/ 

·  Vauzour, D., Vafeiadou, K., Rodriguez-Mateos, A., Rendeiro, C., & Spencer, J. P. (2008). The neuroprotective potential of flavonoids: a multiplicity of effects. Genes & Nutrition, 3(3–4), 115–126. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12275588/ 

·  NIH Office of Dietary Supplements. Vitamin C. Fact Sheet for Health Professionals. https://ods.od.nih.gov/factsheets/VitaminC-HealthProfessional/ 

·  NIH Office of Dietary Supplements. Vitamin E. Fact Sheet for Health Professionals. https://ods.od.nih.gov/factsheets/VitaminE-HealthProfessional/ 

·  NIH Office of Dietary Supplements. Vitamin A. Fact Sheet for Health Professionals. https://ods.od.nih.gov/factsheets/VitaminA-HealthProfessional/ 

·  NIH Office of Dietary Supplements. Selenium. Fact Sheet for Health Professionals. https://ods.od.nih.gov/factsheets/Selenium-HealthProfessional/ 

·  NIH Office of Dietary Supplements. Zinc. Fact Sheet for Health Professionals. https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/ 

·  World Cancer Research Fund / American Institute for Cancer Research (WCRF/AICR). ATBC Study: Beta-Carotene and Cancer Risk. https://www.wcrf.org/dietandcancer

·  Scalbert, A., Manach, C., Morand, C., Remesy, C., & Jimenez, L. (2005). Dietary polyphenols and the prevention of diseases. Critical Reviews in Food Science and Nutrition, 45(4), 287–306. https://pubmed.ncbi.nlm.nih.gov/16047416/ 

·  Arts, I. C. W., & Hollman, P. C. H. (2005). Polyphenols and disease risk in epidemiologic studies. American Journal of Clinical Nutrition, 81(1 Suppl), 317S–325S. https://pubmed.ncbi.nlm.nih.gov/15640418/ 

·  Das, S., & Das, D. K. (2007). Anti-inflammatory responses of resveratrol. Annals of the New York Academy of Sciences, 1113, 245–254. https://pubmed.ncbi.nlm.nih.gov/17954629/

·  Harvard T.H. Chan School of Public Health. Antioxidants Overview. https://www.hsph.harvard.edu/nutritionsource/antioxidants/

4

Severe asthma is a condition where symptoms remain uncontrolled despite standard treatment.

But why does asthma persist even with medication?
And what happens in the lungs at a deeper level?

What Happens in Severe Asthma?

Asthma involves:

• airway inflammation
• bronchial constriction
• immune dysregulation

Key question:

Why does inflammation keep returning?

Symptoms

Patients often ask:

“Why do I still struggle to breathe despite treatment?”

Symptoms include:

• shortness of breath
• wheezing
• chest tightness
• coughing

Limitations of Treatment

Standard therapies:

• inhalers
• steroids

But:

They do not fully normalize immune response.

Disease Stage and Regenerative Therapy Considerations

Early Stages

• inflammation more reversible
• better response potential

Severe Stages

“Can asthma still be improved?”

Focus shifts to:

• reducing inflammation
• improving lung function

Individualized Care

Treatment depends on:

• severity
• triggers
• response

Repeated Approaches

Multiple strategies may be required.

Why Barcelona?

Barcelona team with 25+ years experience works on chronic respiratory conditions.

Stem Cell Therapy

Studied for:

• inflammation reduction
• immune modulation

Contact

Details below.

4

Chronic Lyme disease is a controversial and complex condition where patients experience persistent symptoms long after initial infection.

But why do symptoms continue even after treatment?
And can deeper biological processes be involved?

What Happens in Chronic Lyme Disease?

Possible mechanisms include:

• immune dysregulation
• persistent inflammation
• nervous system involvement

Key question:

Is the problem infection, or the body’s response to it?

Symptoms

Patients often ask:

“Why do I still feel sick months or years later?”

Common symptoms:

• fatigue
• joint pain
• brain fog
• neurological symptoms

Why Treatment Is Challenging

Standard treatment may not fully address:

• chronic inflammation
• immune imbalance
• systemic dysfunction

Disease Stage and Regenerative Therapy Considerations

The progression of Chronic Lyme Disease varies significantly.

Early Stages

At early stages:

• inflammation may be reversible
• immune response is more adaptable

Regenerative approaches may support:

• immune balance
• recovery processes

Chronic Stages

“Why do symptoms become long-term?”

In chronic cases:

• immune dysfunction persists
• inflammation becomes systemic

Treatment may focus on:

• reducing inflammation
• supporting recovery

Individualized Approach

Each case is different and requires:

• detailed evaluation
• personalized strategy

Repeated Strategies

“Is one treatment enough?”

Chronic conditions may require multiple approaches.

Why Barcelona?

Barcelona’s biotechnology center has 25+ years of experience in complex systemic conditions.

Stem Cell Therapy Perspective

Stem cell therapy is being studied for:

• immune modulation
• inflammation control
• systemic recovery

Contact

Contact details below.

Plantar fasciitis is one of the most common causes of chronic heel pain, resulting from inflammation and microdamage of the plantar fascia — the connective tissue supporting the foot arch.

But why does heel pain persist for months or even years?
And why do many patients fail to recover with standard treatment?

What Happens in Plantar Fasciitis?

The plantar fascia experiences repeated stress during walking and standing.

Over time, this leads to:

• microtears
• inflammation
• tissue degeneration

This raises an important question:
Why does the tissue fail to heal properly?

Because repeated stress prevents full recovery and leads to chronic inflammation.

Symptoms

Patients often ask:

“Why is heel pain worse in the morning?”

Common symptoms include:

• sharp heel pain
• pain after rest
• discomfort when walking
• stiffness

Limitations of Standard Treatment

Conventional treatments include:

• rest and stretching
• orthotics
• anti-inflammatory medications
• injections

However:

These treatments do not always restore damaged tissue.

Disease Stage and Regenerative Therapy Considerations

The effectiveness of treatment for Plantar Fasciitis often depends on the stage of tissue damage.

Early and Moderate Stages

At early stages:

• inflammation is still reversible
• tissue structure is partially preserved

Stem cell therapy is being explored to:

• support tissue repair
• reduce inflammation
• improve healing

Chronic Stages

Patients often ask:

“Why does my heel pain never go away?”

In chronic cases:

• tissue degeneration increases
• healing becomes slower

Treatment may focus on:

• improving tissue quality
• reducing pain
• supporting regeneration

Individualized Strategies

Treatment depends on:

• duration of symptoms
• level of damage
• lifestyle factors

Repeated Approaches

“Do I need more than one treatment?”

Some patients may require staged or repeated approaches.

Why Barcelona?

In a biotechnology laboratory in Barcelona, Spain, a team with over 25 years of experience develops regenerative approaches for musculoskeletal conditions.

Regenerative Medicine Perspective

Stem cell therapy is being studied for:

• fascia repair
• inflammation reduction
• tissue regeneration

Contact

Contact details are available below

4

Avascular Necrosis (AVN) of the hip is a progressive condition caused by disruption of blood supply to the femoral head, leading to bone tissue death and joint degeneration.

But what makes this condition particularly serious?
And can modern regenerative approaches such as stem cell therapy offer a way to avoid surgery?

What Happens in AVN?

When blood flow is reduced, bone cells begin to die. Over time, this leads to:

• structural weakening
• microfractures
• collapse of the femoral head

This raises an important question:
Why does the joint deteriorate so quickly once the process begins?

Because bone tissue cannot regenerate effectively without adequate blood supply.

Symptoms

Patients often ask:

“Why does hip pain appear without injury?”

Common symptoms include:

• deep hip or groin pain
• stiffness
• limited mobility
• pain during walking

In advanced stages:

• constant pain
• difficulty walking
• joint collapse

Limitations of Standard Treatment

Conventional treatment includes:

• medications
• reduced load
• surgical procedures
• hip replacement

The key issue:

These treatments do not restore dead bone tissue.

Disease Stage and Regenerative Therapy Considerations

The effectiveness of treatment approaches for conditions such as Avascular Necrosis of the hip often depends on the stage and progression of the disease.

This leads to an important question:
Does the stage of the disease influence the potential response to regenerative therapies?

Early and Moderate Stages

In earlier stages, when structural damage is still limited, there is generally a greater potential to:

• support bone regeneration
• improve blood supply
• reduce inflammation
• preserve joint structure

At this stage, regenerative approaches such as stem cell therapy are being explored as a way to support biological repair processes.

Advanced Stages

In more advanced stages, patients often ask:

“Is it too late to consider alternative approaches?”

While structural changes may already be significant, treatment strategies may still focus on:

• improving function
• reducing symptoms
• supporting remaining bone tissue
• delaying joint replacement

Individualized Treatment Strategies

Regenerative medicine is based on individualized protocols.

Treatment approaches may vary depending on:

• stage of AVN
• degree of bone collapse
• patient condition
• clinical factors

Repeated and Staged Approaches

Another common question:

“Is one treatment session enough?”

In some cases, particularly in progressive conditions, a staged approach may be considered, including:

• follow-up procedures
• repeated applications
• long-term monitoring

Why Barcelona?

In a biotechnology laboratory in Barcelona, Spain, an international team with over 25 years of experience in stem cell therapy focuses on:

• complex orthopedic conditions
• personalized treatment strategies
• regenerative approaches

Stem Cell Therapy and Bone Regeneration

Stem cell therapy is being studied for:

• bone regeneration
• improved circulation
• inflammation control
• structural support

Why Patients Look for Alternatives

Many patients search:

“Can I avoid hip replacement?”

This is where regenerative medicine becomes relevant.

Future of AVN Treatment

Key question:

Will future treatment focus on preserving joints instead of replacing them?

Contact

If you are exploring options for Avascular Necrosis, you can contact the medical team below.

4

Psoriasis is a chronic autoimmune skin condition characterized by rapid skin cell turnover and inflammation, leading to visible plaques, redness, and discomfort.

But why does psoriasis keep returning?
And why do treatments often provide only temporary relief?

What Happens in Psoriasis?

Psoriasis is driven by immune system dysfunction, leading to:

• excessive skin cell production
• chronic inflammation
• abnormal immune signaling

This raises a key question:

Why does the skin regenerate too quickly and incorrectly?

Because immune signals stimulate uncontrolled cell growth.

Symptoms

Patients often ask:

“Why do my skin lesions come back again and again?”

Common symptoms include:

• red, scaly patches
• itching
• skin irritation
• cracking or bleeding

Standard Treatment Options

Treatment typically includes:

• topical therapies
• phototherapy
• systemic medications
• biologics

Why Treatment Has Limitations

Key issue:

Most treatments control symptoms but do not normalize immune function.

This leads to:

• relapses
• long-term medication use
• variable effectiveness

Can Psoriasis Be Controlled Long-Term?

This is a central question:

“Is long-term remission possible?”

Stem Cell Therapy and Immune Balance

Stem cell therapy is being studied for:

• immune modulation
• inflammation reduction
• skin regeneration support

Why Barcelona?

In a biotechnology laboratory in Barcelona, Spain, a team with more than 25 years of experience focuses on complex inflammatory and autoimmune conditions.

What Makes This Approach Different?

Regenerative medicine aims to:

• address immune dysregulation
• support systemic balance
• improve long-term outcomes

Who May Benefit?

Patients with:

• moderate to severe psoriasis
• frequent relapses
• limited response to treatment

Future Outlook

The key question:

Can we treat psoriasis at the immune system level instead of just the skin?

This is where research is heading.

Contact

If you are exploring advanced approaches for psoriasis, contact details are available below.

4

Rheumatoid Arthritis (RA) is a chronic autoimmune disease in which the immune system mistakenly attacks the joints, leading to inflammation, pain, and progressive joint damage.

But why does the body attack its own tissues?
And can modern medicine go beyond suppressing symptoms to actually regulate the immune system?

What Happens in Rheumatoid Arthritis?

In RA, the immune system targets the synovial membrane, causing:

• chronic inflammation
• joint swelling
• cartilage destruction
• bone erosion

This leads to a key question:

Why does inflammation become chronic instead of resolving naturally?

Because the immune system becomes dysregulated and continues attacking healthy tissue.

Symptoms

Patients often ask:

“Why are my joints swollen and painful every morning?”

Common symptoms include:

• joint pain and stiffness
• swelling
• fatigue
• reduced mobility

In advanced stages:

• joint deformity
• loss of function
• systemic symptoms

Standard Treatment Options

Conventional treatment includes:

• anti-inflammatory drugs
• immunosuppressants
• biologic therapies

Why Treatment Is Not Always Enough

Key issue:

Most treatments suppress the immune system but do not fully restore balance.

This may lead to:

• ongoing disease activity
• side effects
• incomplete remission

Can the Immune System Be Reset?

This is one of the most important questions:

“Is it possible to regulate immune dysfunction rather than suppress it?”

Stem Cell Therapy and Immune Modulation

Stem cell therapy is being studied for its potential to:

• modulate immune responses
• reduce chronic inflammation
• support tissue repair
• improve immune balance

Why Patients Explore Barcelona

Patients often search:

“Where can I find advanced treatment for rheumatoid arthritis?”

In a biotechnology laboratory in Barcelona, Spain, an international team with over 25 years of experience in stem cell therapy is working on autoimmune conditions.

What Makes This Approach Different?

Instead of suppressing immunity, regenerative approaches aim to:

• regulate immune activity
• restore balance
• support long-term stability

Can Stem Cell Therapy Improve RA Outcomes?

Research suggests potential in:

• reducing inflammation
• improving joint function
• supporting immune regulation

However, results vary.

Future of RA Treatment

The key question:

Can we move from suppression to immune regulation?

This is a major focus of modern research.

Contact

If you are exploring options for rheumatoid arthritis, you can contact the medical team below.

4

Long COVID syndrome refers to a condition in which symptoms persist weeks or months after the initial COVID-19 infection.

But why do symptoms continue long after the virus is gone?
And why do some patients struggle to recover fully?

What Happens in Long COVID?

Long COVID is believed to involve:

• immune system dysregulation
• chronic inflammation
• nervous system imbalance
• vascular dysfunction

This leads to a key question:

Why does the body not return to normal after infection?

Because underlying biological processes remain disrupted.

Symptoms

Patients frequently ask:

“Why do I still feel sick months after COVID?”

Common symptoms include:

• fatigue
• brain fog
• shortness of breath
• heart palpitations
• muscle pain

Why Standard Treatment Is Limited

Currently, there is no single treatment for Long COVID.

Management focuses on:

• symptom relief
• rehabilitation
• supportive care

Why Do Symptoms Persist?

Possible reasons include:

• ongoing inflammation
• immune imbalance
• cellular dysfunction

This raises a deeper question:

Can recovery be accelerated at the biological level?

Stem Cell Therapy and Recovery

Stem cell therapy is being studied for:

• immune modulation
• inflammation reduction
• tissue repair
• systemic recovery

Why Barcelona?

In a biotechnology laboratory in Barcelona, Spain, a multidisciplinary team with over 25 years of experience is working on complex post-viral conditions.

Why This Approach Matters

Unlike standard care, regenerative medicine focuses on:

• restoring biological balance
• supporting recovery mechanisms
• improving long-term outcomes

Who May Benefit?

Patients with:

• persistent symptoms
• fatigue and brain fog
• incomplete recovery

Future Outlook

The key question:

Can we treat Long COVID as a systemic biological condition?

Research suggests this approach may be key.

Contact

If you are experiencing Long COVID symptoms, you can contact the medical team below.

4

Chronic Obstructive Pulmonary Disease (COPD) is a progressive lung condition characterized by airflow limitation, inflammation, and structural damage to lung tissue.

But why does COPD continue to worsen over time?
And is there a way to go beyond symptom control and support lung repair?

What Happens in COPD?

COPD involves multiple pathological processes:

• chronic inflammation of airways
• destruction of alveoli (emphysema)
• narrowing of bronchial tubes
• reduced oxygen exchange

This leads to a fundamental question:

Why do patients feel breathless even at rest?

Because damaged lung tissue cannot effectively transfer oxygen into the bloodstream.

Symptoms

Patients often ask:

“Why is my breathing getting worse every year?”

Common symptoms include:

• shortness of breath
• chronic cough
• mucus production
• fatigue

In advanced stages:

• oxygen dependency
• limited physical activity
• frequent exacerbations

Standard Treatment Options

Conventional COPD treatment includes:

• bronchodilators
• inhaled corticosteroids
• oxygen therapy
• pulmonary rehabilitation

Why Treatment Is Limited

Key issue:

COPD treatments do not restore damaged lung tissue.

They help:

• manage symptoms
• slow progression

But they do not reverse structural damage.

Can Lung Function Be Improved?

This is one of the most important questions:

“Can damaged lungs recover?”

Traditionally, the answer has been limited.
However, modern research is exploring new possibilities.

Stem Cell Therapy and Lung Regeneration

Stem cell therapy is being studied for its potential to:

• reduce inflammation in lung tissue
• support repair of damaged alveoli
• improve immune regulation
• enhance oxygen exchange

Why Patients Look for Advanced Treatment

Patients increasingly search:

“Where can I find advanced treatment for COPD?”

In a biotechnology laboratory in Barcelona, Spain, an international team with over 25 years of experience in stem cell therapy is working on chronic lung diseases.

What Makes This Approach Different?

Instead of focusing only on symptom relief, regenerative medicine aims to:

• improve lung microenvironment
• support tissue repair
• enhance biological function

Can Stem Cell Therapy Reduce COPD Progression?

Research suggests that stem cells may help:

• reduce inflammation
• improve lung function
• support recovery processes

However, outcomes vary between individuals.

Future of COPD Treatment

The key question:

Will future COPD treatment focus on regeneration instead of maintenance?

This shift is already being explored in modern medicine.

Contact

If you are exploring options for COPD treatment, you can contact the medical team below.