Frontiers Glutathione: A Samsonian life sustaining small molecule that protects against oxidative stress, ageing and damaging inflammation Glutathione is a small protein made of three amino acids. It is often called the master antioxidant because it helps regenerate other antioxidants like vitamin C and vitamin E. Key Benefits Schematic representation of the structure of a Glutathione Download Scientific Diagram Competition between glutathione and protein thiols for disulphide bond formation Nature Cell Biology