The effectiveness of compound X is oftentimes dependent on the presence of compounds Y and Z and so on. Endogenous compounds like glutathione get a lot of commercial attention but they do GlutaGlow 1st Oxidized Glutathione Cream : Amazon.in: Health & Personal Care What Is Reduced Glutathione? Benefits, Sources & Uses What is the role of glutathione in the red blood cells? What is the mechanism of glutathione reductase when reducing oxidized glutathione? Quora File:Glutathione Reductase and Peroxidase Graphic.jpg Wikimedia Commons