The human body has the ability to produce antioxidant molecules. The most important of these is glutathione, which is found both in the blood and in various tissues. It works by neutralizing free radicals indirectly as it is a necessary factor for the smooth action of the entire antioxidant mechanism of the body.

In this way it protects the organism against oxidative stress.
Glutathione is particularly important for the FoodOxys personalized nutritional approach. It is known that each person responds differently to a regimen of antioxidants administered depending on their blood glutathione levels. Therefore, individuals with a relatively high concentration of endogenous glutathione have less chance of improving their antioxidant defense through diet, whereas the opposite is true for individuals with low glutathione.