Upregulation of catalase and downregulation of glutathione peroxidase activity in the kidney precede the development of hypertension in pre hypertensive SHR Hypertension Research Re:Re: First line defence antioxidants superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) anti aging , , Figure 1 from Comparing glutathione peroxidase and glutathione reductase activity and their associations with cardiovascular measures in Africans and Caucasians : the SABPA study Semantic Scholar Measurement of superoxide dismutase, catalase and glutathione peroxidase in cultured cells and tissue Nature Protocols Protection Against Oxidative Stress and IGF I Deficiency Conditions IntechOpen Neutralizing the threat of excess free radicals your body's natural defense system The NEI Connection