Although G6PD deficiency, which can cause problems in red blood cells upon certain triggers, is the most common human enzyme defect, affecting over 400 million people, including over 1 in 10 Black Reductive Stress Causes Oxidative Stress (Take 2) Fire In A Bottle The role of reduced glutathione (GSH) in the process of spermatic capacitation IVIS S Glutathionylation: From Molecular Mechanisms to Health Outcomes Ying Xiong, Joachim D. Uys, Kenneth D. Tew, Danyelle M. Townsend, 2011