Glow & Renew Duo: NAD+ & Glutathione, 12 Month Supply Full article: Gamma Glutamyl Transferase: The Silent Partner? 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 Frontiers Redox homeostasis via gene families of ascorbate glutathione pathway The effectiveness of compound X is oftentimes dependent on the presence of compounds Y and Z and so on. Endogenous compounds like glutathione get a lot of commercial attention but they do