Measurement of superoxide dismutase, catalase and glutathione peroxidase in cultured cells and tissue Nature Protocols Glutathione Peroxidase: An Antioxidant Enzyme In Health And Disease Biohacker's Glutathione is the body's main antioxidant defense mechanism produced in the liver. It protects against free radicals and helps to eliminate lipid peroxides as well as toxins. This is by Rapid and effective protocol to measure glutathione peroxidase activity Bulletin of the National Research Centre Springer Nature Link The functions of glutathione peroxidase in ROS homeostasis and fruiting body development in Hypsizygus marmoreus Applied Microbiology and Biotechnology Springer Nature Link