Free Radical Protection With Milk Thistle Extract & Alpha Lipoic Acid Setria A Dietary Supplement Vegetarian/Vegan Non-GMO Kosher Amino Acids Family Owned Since 1968 GMP Quality Assured 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 the body's defense system against oxidative stress by directly neutralizing free radicals, as well as by maintaining the activity of vitamins C and E. Milk Thistle Extract and Alpha Lipoic Acid are included as complementary ingredients.