786 993 Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification Glutathione: The Master Antioxidant Core Med Science 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 Competition between glutathione and protein thiols for disulphide bond formation Nature Cell Biology What is Glutathione? Benefits, Dosages, and Side Effects