G6PD Deficiency and G6PD Activity Testing Mindray 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 (G6PD) Enzyme ROS Scavenger Biochemistry & Hematology YouTube Glucose 6 Phosphate Dehydrogenase Deficiency Oncohema Key Glucose 6 Phosphate Dehydrogenase Deficiency Springer Nature Link