Built beyond glutathione Our newest formula combines liposomal glutathione with Vitamin C, Riboflavin, Selenium, and Resveratrol to support antioxidant activity at multiple levels.* Swipe through to see what's inside and how 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 Measurement of superoxide dismutase, catalase and glutathione peroxidase in cultured cells and tissue Nature Protocols 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