Amazon.com: PURE ORIGINAL INGREDIENTS L Glutathione, (100 Capsules) Reduced, Always Pure, No Additives Or Fillers, Lab Verified : Health & Household Glutamine, Glutamate, and Glutathione: What They Are and Why They are Important Anti Aging And Wellness Clinic Critical Roles of the CysteineGlutathione Axis in the Production of Glutamyl Peptides in the Nervous System Glutamine in the Fetus and Critically Ill Low Birth Weight Neonate: Metabolism and Mechanism of Action The Journal of Nutrition Glutamine Metabolism in Brain Tumors 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.