File:Pathology of G6PD deficiency.png Wikimedia Commons 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 Glucose 6 Phosphate Dehydrogenase: Update and Analysis of New Mutations around the World Glucose 6 phosphate Dehydrogenase (G6PD) Enzyme ROS Scavenger Biochemistry & Hematology In RBCs, NADPH are produced exclusively via HMP shunt by the action of G6PD and are responsible to maintain membrane integrity preventing premature destruction. That is why G6PD deficient RBCs are