About Glutathione Tripeptide with an unusual peptide linkage between the amine group of cysteine (which is attached by normal peptide linkage to a glycine) and the carboxyl group of the glutamate side-chain. Mechanism of Action of Glutathione Powerful antioxidant- co-factor in Phase I hepatic detoxification- involved in synthesis of DNA & proteins, amino acid transport, enzyme activation, immune system function.