Glutathione facts: 1. Glutathione is an important antioxidant in the body that helps protect cells from damage caused by free radicals. It is found in almost every cell and is composed of Glutathione peroxidase 4 catalyzed reduction of lipid hydroperoxides in membranes: The polar head of membrane phospholipids binds the enzyme and addresses the fatty acid hydroperoxide group toward the redox center ScienceDirect The Science Behind Topical Glutathione for Skin Brightening Chicnutrix L Glutathione (Reduced), 500 mg, 120 Veggie Capsules Mitochondrial Glutathione in Cellular Redox Homeostasis and Disease Manifestation