Glutathione Biochemistry Glutathione Synthesis Enzymes Glyteine TJ. Glutathione peroxidase is an important enzyme in cellular antioxidant defense systems, detoxifying peroxides and hydroperoxides. As a component of the glutathione cycle, it protects the liver from reactive oxygen metabolites. Selenocysteine Glutathione is such an important antioxidant in human physiology, meaning it acts to combat oxidative stress. Strategies for increasing glutathione include: Consume sulfur rich foods like cruciferous vegetables Ensure you get Glutathione is a tripeptide cofactor for the enzyme Chegg.com Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification Genetic Validation of Trypanosoma brucei Glutathione Synthetase as an Essential Enzyme Eukaryotic Cell