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 File:Glutathion metabolism DE state in G6PD deficiency.png Wikimedia Commons Understanding and Managing Glucose 6 Phosphate Dehydrogenase Deficiency ScienceDirect How to Check Your Genetic Data for G6PD Deficiency How to Check Your Genetic Data for G6PD Deficiency Management of Athletes With G6PD Deficiency: Does Missing an Enzyme Mean Missing More Games? Shane N. Stone, Karl V. Reisig, Heather L. Saffel, Christopher M. Miles, 2020