The effectiveness of compound X is often dependent on the presence of compounds Y and Z and so on. Endogenous compounds like glutathione get much commercial attention but they do not work Glutathione Peroxidase 2 an overview ScienceDirect Topics Selective Small Molecule Activator of Patient Derived GPX4 Variant ACS Chemical Biology Glutathione Peroxidase 1 Regulates Mitochondrial Function to Modulate Redox dependent Cellular Responses* Effects of selenium and glutathione peroxidase on the biosynthesis of prostaglandin E and F by the ram vesicular gland Semantic Scholar Frontiers Research progress of glutathione peroxidase family (GPX) in redoxidation