Hepatic Glucose 6 Phosphate Dehydrogenase (G6PD) plays a pivotal role in the Pentose Phosphate Pathway, generating NADPH for antioxidant defense and supporting nucleotide & amino acid biosynthesis. G6PD Deficiency causes Haemolytic Anaemia Glucose 6 phosphate dehydrogenase is an enzyme in the hexose monophosphate shunt that synthesizes NADPH. The NADPH is used to convert oxidized glutathione (GSSG) to reduced glutathione ( Glucose 6 Phosphate Dehydrogenase G6PD Deficiency and G6PD Activity Testing Mindray Frontiers Glucose 6 Phosphate Dehydrogenase Deficiency and Neonatal Hyperbilirubinemia: Insights on Pathophysiology, Diagnosis, and Gene Variants in Disease Heterogeneity