Antioxidants and skin health
Free radicals, diet and evidence
Antioxidants help to protect the cells against oxidative stress, but they do not stop ageing or replace photoprotection. The best strategy is to obtain them through a varied and balanced diet, reserving supplements for specific situations.
What are antioxidants?
Antioxidants are substances capable of protecting the cells against the damage produced by free radicals, very reactive molecules that are generated naturally during metabolism and that also increase due to external factors such as solar radiation, tobacco, pollution or an unhealthy diet.
Our organism has its own antioxidant systems, but it also obtains antioxidants through diet.
What are free radicals?
Free radicals are unstable molecules that, when produced in excess, generate a phenomenon called oxidative stress.
This excess can contribute to cellular ageing and participate in the development of various diseases.
In the skin, oxidative stress favours:
Which antioxidants are the best known?
Among the main ones stand out:
- Vitamin C.
- Vitamin E.
- Beta-carotenes.
- Polyphenols.
- Flavonoids.
- Coenzyme Q10.
- Resveratrol.
- Lycopene.
- Selenium.
- Zinc.
Each one acts by different mechanisms and none can be considered superior in all situations.
What benefits do they have for the skin?
A diet rich in antioxidants can contribute to:
- Reducing oxidative stress.
- Favouring the normal functioning of the skin cells.
- Maintaining healthier skin.
- Complementing protection against environmental damage.
However, antioxidants do not stop ageing or replace photoprotection.
Do antioxidant supplements improve the skin?
The scientific evidence is variable.
At present, there is no solid proof that justifies recommending antioxidant supplements systematically to prevent skin ageing or improve skin quality in healthy people.
In most cases, a balanced diet provides sufficient quantities.
Is it better to obtain antioxidants through diet?
Yes.
Foods contain a natural combination of vitamins, minerals, fibre and hundreds of bioactive compounds that act together.
This effect cannot be reproduced simply by means of a capsule.
Therefore, the main scientific societies recommend always prioritising diet.
Which foods are especially rich in antioxidants?
Among the most notable are:
- Berries.
- Citrus fruits.
- Kiwi.
- Grapes.
- Tomato.
- Carrot.
- Spinach.
- Broccoli.
- Peppers.
- Nuts.
- Green tea.
- Pure cocoa.
- Extra virgin olive oil.
A varied diet provides a wide range of natural antioxidants.
Do antioxidants prevent ageing?
No.
Ageing is a complex biological process influenced by:
- Genetics.
- Sun exposure.
- Tobacco.
- Diet.
- Pollution.
- Lifestyle.
Antioxidants can be part of a global health strategy, but they are not able to stop ageing on their own.
Do they protect against the sun?
They do not replace sunscreen.
Although some antioxidants can help to reduce part of the oxidative damage induced by ultraviolet radiation, no supplement replaces the daily use of photoprotection.
Can they be harmful?
Yes.
Taking large doses of antioxidants by means of supplements is not always beneficial.
In some cases, an excess can even alter normal physiological processes or interact with certain medications.
Therefore, supplementation must be individualised.
Who may need supplements?
Some people with nutritional deficiencies, specific diseases or concrete clinical situations may benefit from a targeted supplementation.
However, in the general population its systematic use is not recommended without a medical indication.
Myths and facts
- Myth: Antioxidants stop ageing. Fact: No. They can help to reduce oxidative stress, but they do not stop the ageing process.
- Myth: The more antioxidants I take, the better. Fact: The excess does not necessarily provide more benefits and can sometimes be harmful.
- Myth: A capsule replaces a healthy diet. Fact: No supplement reproduces the nutritional complexity of foods.
- Myth: Antioxidants replace sunscreen. Fact: Photoprotection remains the most effective measure against photoageing and skin cancer.
- Myth: All antioxidant supplements have scientific evidence. Fact: The evidence is very variable depending on the compound studied.
The essential points to remember
- Antioxidants help to protect the cells against oxidative stress.
- The best source of antioxidants is a varied diet rich in fruits, vegetables and natural foods.
- There is not enough proof to recommend antioxidant supplements systematically.
- Antioxidants do not replace photoprotection or medical skin treatments.
- Healthy ageing depends on multiple factors and not on a single nutrient.
- A balanced diet and a healthy lifestyle remain the most effective tools to take care of the skin.
Frequently asked questions
Which is the best antioxidant for the skin?
There is no single superior antioxidant. What matters is maintaining a varied and balanced diet.
Is it better to eat fruit or take supplements?
Whenever possible, diet constitutes the first option.
Is vitamin C an antioxidant?
Yes. It is one of the best-studied antioxidants.
Do antioxidants eliminate wrinkles?
No. They can contribute to reducing oxidative damage, but they do not eliminate wrinkles.
Does green tea have antioxidants?
Yes. It is rich in polyphenols with antioxidant activity.
Should I take antioxidants every day?
It is advisable to consume them through a diet rich in fruits, vegetables and other healthy foods.
Do smokers need more antioxidants?
Tobacco increases oxidative stress, although the best measure remains quitting smoking.
Are supplements always safe?
No. Some can interact with medications or be harmful at high doses.
Do antioxidants prevent skin cancer?
No. Prevention is based mainly on photoprotection and on avoiding excessive sun exposure.
Who should recommend an antioxidant supplement?
Always a health professional after assessing the individual situation.
Need personalised guidance?
This guide is for information only and does not replace a medical consultation. For an assessment tailored to your case, you may request a consultation.
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