G6PD Deficiency. Treatment with Our Supplements. Solved 8. Glucose 6 phosphate dehydrogenase deficiency: Chegg.com 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 The potential link between inherited G6PD deficiency, oxidative stress, and vitamin D deficiency and the racial inequities in mortality associated with COVID 19 ScienceDirect Full article: G6PD Deficiency: Imbalance Of Functional Dichotomy Contributing to the Severity of COVID 19