What is Glutathione? What are the Benefits of Glutathione? Private Magnet Hospital Glutathione is an antioxidant that's made up of the three amino acids glutamine, glycine, and cysteineall of which are rich in the mineral sulfur. The main functions of glutathione are to fend off Glutamine regulates reactive oxidative stress. Glutamine contributes to Download Scientific Diagram Movement of glutamate, glutamine, cystine, glutathione and xanthine by Download Scientific Diagram Monosodium Glutamate MSG, Glutamic Acid Glutamate, Glutamine Review Hammer Nutrition