Glutathione is a small peptide molecule composed of three amino acids: cysteine, glutamic acid, and glycine. It is produced by every cell of the body, with especially high levels in the liver. Glutathione is critical for healthy immune system function and is necessary for proper detoxification processes. It also plays a critical role in maintaining cellular health by directly neutralizing free radicals, as well as by maintaining the activity of vitamins C and E. This product has glutathione in its reduced, active form for optimal bioavailability.