Health Tip on Glutathione Can Boost Immune System Dr. Glutathione (GSH) is the most prevalent, powerful antioxidant in the body and recharges other antioxidants, but our ability to produce it declines as we age. That's why it's a Glutathione is an amino acid and that acts as a powerful antioxidant to preserve and protect the brain and other body tissues by protecting them from the damage of free radicals and Glutathione as a skin whitening agent: Facts, myths, evidence and controversies Indian Journal of Dermatology, Venereology and Leprology