The Liver isthe most powerful detoxification organ in the body, which explains why it is the organin which the highest concentration of glutathione is found within the human body.
Glutathione being a endogenous antioxidant which is made by our own bodies. Because they are produced by our own bodies and not obtained from food sources, endogenous antioxidants are far more potent than wxogenous antioxidnats.
Endogenous antioxidants repair ALL of the the free radical damage by initiating cell regeneration from the inside on out, whereas, exogenous antioxidants only repair some of the free rdical damage from the outside on in by stimulating (not initiating) cell regeneration.