lipid peroxide accumulation is mainly by absence, or insufficient activity, of selenium peroxidase glutathione peroxidase 4 (GPX4) 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 Figure 2 from Oxidative stress in asthma and COPD: antioxidants as a therapeutic strategy. Semantic Scholar Understanding the antioxidant defense Feed & Additive Magazine