Glutathione synthesis hi res stock photography and images Alamy The Importance of Glutathione in Health and Healing Dr. Todd Maderis Glutathione is the body's primary internal antioxidant, made using the amino acid cysteine, and it helps protect cells from oxidative stress. Beyond detoxification, research shows glutathione is involved in thyroid hormone metabolism, Amazon.com: BulkSupplements.com L Glutamic Acid Powder Glutamate Supplement, Amino Acid Supplement Unflavored & Gluten Free, 4g per Serving, 100g (3.5 oz) (Pack of 1) : Health & Household NAC vs. Glutathione and How They Work Invigor Medical Benefits of Glutathione." Glutathione is a compound involved as a coenzyme in oxidationreduction reactions in cells. It is a tripeptide derived from 3 amino acids: Cysteine, glutamate (from glutamic acid), and glycine.