Frontiers Glutathione: A Samsonian life sustaining small molecule that protects against oxidative stress, ageing and damaging inflammation Glutathione is nicknamed the master antioxidant because it is the most abundant, body produced (endogenous) antioxidant found in every cell, essential for neutralizing free radicals, recycling other antioxidants (like Vitamin C and E), : ' ! This master antioxidant, made from glutamine, glycine, cystine, and selenium fights free radicals and supports tissue repair The diverse roles of glutathione associated cell resistance against hypericin photodynamic therapy ScienceDirect