Protein Glutathionylation in Cardiovascular Diseases Glutathione Reductase human Glutathione: The Super Antioxidant ANM Jupiter Glutathione in Protein Redox Modulation through S Glutathionylation and S Nitrosylation 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