Endogenous Glutathione Conjugates: Occurrence and Biological Functions Pharmacological Reviews Glutathione: your body's master antioxidant & detoxifier Glutathione is the 2nd most abundant molecule in the body, just after water. Its made from three amino acids: glycine, cysteine, & glutamate. Figure 1 from The role of glutathione in photosynthetic organisms: emerging functions for glutaredoxins and glutathionylation. Semantic Scholar 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),