Phase 1 · Understand the Body — Why the disease behaves the way it does.
The One-Line Truth
The whole disease in one chain
Everything on this page exists to explain this line.
G6PD deficiency means red blood cells cannot protect themselves from oxidative stress, so they suddenly burst when exposed to certain triggers like fava beans, infections, or specific medications.
The Battery-Powered Air Filter
Imagine a red blood cell as a delivery truck constantly driving through a polluted city (the bloodstream). G6PD is the battery that powers the truck's air filter, keeping toxic fumes (oxidants like hydrogen peroxide) from damaging the engine (hemoglobin) and the truck's frame (cell membrane). In G6PD deficiency, the battery is weak, so when the truck drives through extra-polluted zones (triggered by infections, fava beans, or certain drugs), the air filter can't keep up. Poisonous fumes build up inside the cab, the engine corrodes into clumps (Heinz bodies), and the frame rusts and cracks (membrane damage). The truck suddenly breaks down and stops working, and the body has to scrap it faster than the factory (bone marrow) can build new ones.
American Society of Hematology (ASH) guidelines on diagnosis and management of glucose-6-phosphate dehydrogenase deficiency, 2020 · Centers for Disease Control and Prevention (CDC) recommendations for G6PD testing and prevention of drug-induced hemolysis, 2021 · National Institutes of Health (NIH) Genetic and Rare Diseases Information Center G6PD deficiency clinical overview, 2022 · American Academy of Pediatrics (AAP) guidelines on screening and management of G6PD deficiency in newborns and children, 2019 · reviewed 2026-08-29