Glutathione Synthesis Explained: How Your Body Builds Its Master Antioxidant OrganiClinic 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 The ascorbateglutathione cycle coming of age Glutathione redox cycle. In the schematic diagram are represented the Download Scientific Diagram Glutathione levels and activities of glutathione metabolism enzymes in patients with schizophrenia: A systematic review and meta analysis Sakiko Tsugawa, Yoshihiro Noda, Ryosuke Tarumi, Yu Mimura, Kazunari Yoshida, Yusuke Iwata, Muhammad Elsalhy,