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 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. Glutathione, a tripeptide found in virtually all cells, functions as a reducing agent. The structure of glutathione is: What amino acids make up glutathione? Homework.Study.com 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,