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, Frontiers Glutathione: A Samsonian life sustaining small molecule that protects against oxidative stress, ageing and damaging inflammation Pyroglutamic acidosis by glutathione regeneration blockage in critical patients with septic shock Critical Care Springer Nature Link Re:Impact of Supplementary Amino Acids, Micronutrients, and Overall Diet on Glutathione Homeostasis orthomolecular medicine , , Three amino acids walk into a bar.the adventures of supporting glutathione synthesis in fatty liver disease using serine & nicotinamide riboside Dr. Kara Fitzgerald