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Protecting your cells means investing in tomorrow.

6 min. read

10/07/2026

Protéger ses cellules, c'est investir dans demain. Protéger ses cellules, c'est investir dans demain. Protéger ses cellules, c'est investir dans demain. Protéger ses cellules, c'est investir dans demain.

05 · Longevity · Journal

Protecting your cells is an investment in tomorrow

Oxidative stress silently ages our cells. Understanding this mechanism already helps you read your body's signals better.

Oxidative stress: the invisible enemy

Every day, our cells produce energy. This vital process also generates by-products called free radicals: unstable molecules that, in excess, damage DNA, proteins and cell membranes.

This is what is known as oxidative stress. It is a natural phenomenon, but it can run out of control under the effect of everyday factors: pollution, an unbalanced diet, chronic stress, sun exposure, intense physical exercise.

When it exceeds the body's defence capacity, oxidative stress sets in for the long term. It is now described as one of the central mechanisms of cellular ageing and chronic low-grade inflammation.

Protecting your cells from oxidative stress: comparison between a healthy cell and a cell under chronic oxidative stress, BIOLOGYST Journal
Fig. 1: A healthy cell vs a cell under chronic oxidative stress

Scientific reference

Oxidative Stress

Sies H., Berndt C., Jones D.P. · Annual Review of Biochemistry · 2017 · Vol. 86 · pp. 715-748

This landmark review, published in the Annual Review of Biochemistry, defines oxidative stress as a fundamental imbalance between the production of reactive oxygen species (ROS) and the body's antioxidant capacity. The authors report that this imbalance is not an epiphenomenon: it is described in the literature as one of the mechanisms involved in cellular ageing.

What we take from it: the balance between the production of reactive oxygen species and antioxidant defences holds a central place in the literature on cellular ageing. It is an area where lifestyle and diet have a part to play.

View the publication →

“Our cells do not simply age with time. They age under the effect of what they go through.”


When your body sends signals

Oxidative stress cannot be seen directly. But it leaves traces that you can learn to recognise.

Signs of chronic oxidative stress

Persistent tiredness
Even after a decent night's sleep, energy does not return.
Dull or reactive skin
Uneven complexion, slower skin recovery, increased sensitivity.
Increased sensitivity
A feeling of being more vulnerable to changes of season or rhythm.
Slow recovery
After exercise or an intense period, the body takes longer to get back into its rhythm.
Vague discomfort
Feelings of heaviness, with no clearly identified cause.

These signals do not mean that something is irreversibly wrong. They simply indicate that the balance between free radical production and antioxidant defences deserves to be strengthened. They are not specific: if symptoms persist, talk to a healthcare professional.

Two key figures

10⁴
Oxidative attacks per cell per day, an order of magnitude commonly cited in the literature
4
Complementary ingredients in the BIOLOGYST formula

Antioxidant Defense: an answer designed to last

ANTIOXIDANT DEFENSE does not provide a single isolated antioxidant. Per 3 capsules, the formula combines vitamin C (150 mg, or 187.5% of NRVs), which contributes to the protection of cells from oxidative stress, with three ingredients documented in the scientific literature: quercetin, Setria® glutathione and ExceptionHYAL® Star hyaluronic acid.

Key ingredients · Mechanisms of action

Ingredient Mechanism
Setria® L-Glutathione · 375 mg A patented form of glutathione, a molecule naturally present inside cells. The literature describes its role in the liver and in recycling other antioxidants. This research describes a mechanism and does not constitute an authorised health claim. See also our Patented ingredients section.
Quercetin · 427.5 mg A flavonoid found notably in onions, apples and capers. The literature describes its antioxidant activity at cellular level. A mechanism described in studies, with no authorised health claim to date.
ExceptionHYAL® Star · 240 mg Hyaluronic acid (218 mg), a natural component of the skin and connective tissue. No authorised health claim to date.
Vitamin C · 150 mg 187.5% of NRVs. Vitamin C contributes to the protection of cells from oxidative stress, to normal collagen formation for the normal function of skin and to the reduction of tiredness and fatigue.

“It is not one antioxidant that makes the difference. It is their collective intelligence.”


For those who think long term

ANTIOXIDANT DEFENSE is for those who understand that health is not managed in an emergency, but maintained day to day. It is particularly relevant if any of the following apply to you:

Relevant profiles

Chronic exposure to stress
A demanding environment, a heavy mental load, urban exposure.
Intense sport
Intense physical exercise generates large amounts of free radicals.
Attention to cellular ageing
The wish to look after your cellular health over the long term. See also Skin Longevity.
Recovery periods
Changes of season, getting back on track after a demanding period, temporary tiredness.
Skin and connective tissue
Vitamin C contributes to normal collagen formation for the normal function of skin. See also Power Hydra Flow.

Recommended dosage

2 to 3 capsules per day, in the morning or at midday, with a meal. A minimum course of 8 weeks is recommended.

Discover Antioxidant Defense

Precautions. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Not recommended for pregnant or breastfeeding women without medical advice. If you are taking medication, consult your healthcare practitioner.

Frequently asked questions

What is oxidative stress?

Oxidative stress is an imbalance between the production of reactive oxygen species (ROS) and the body's antioxidant capacity. Each cell undergoes around 10⁴ oxidative attacks per day. This imbalance is described as one of the central mechanisms of cellular ageing.

What signs can point to chronic oxidative stress?

Five signals come up regularly: persistent tiredness despite sleep, dull or reactive skin, greater sensitivity to changes in rhythm, slow recovery after exercise and a vague feeling of discomfort. These signs are not specific and call for medical advice if they persist.

Which ingredients make up Antioxidant Defense?

The formula combines 4 ingredients: quercetin (427.5 mg), Setria® L-glutathione (375 mg), ExceptionHYAL® Star (240 mg, including 218 mg of hyaluronic acid) and vitamin C (150 mg, or 187.5% of NRVs), per 3 capsules. Vitamin C contributes to the protection of cells from oxidative stress. Quercetin, glutathione and hyaluronic acid do not have any authorised health claim to date: the literature describes their mechanism.

How should Antioxidant Defense be taken?

2 to 3 capsules per day, in the morning or at midday, with a meal. A minimum course of 8 weeks is recommended.

Which nutrients contribute to the protection of cells from oxidative stress?

The nutrients with an authorised claim in Europe include vitamin C, vitamin E, zinc and selenium. Vitamin C also contributes to the reduction of tiredness and fatigue and to normal collagen formation for the normal function of skin. More analyses are available in the BIOLOGYST Journal.

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