Exploring the Association Between Glucose-6-Phosphate Dehydrogenase Deficiency and Autism Spectrum Disorder: A Narrative Review

Autism spectrum disorder (ASD) is a complex neurodevelopmental disease of multifactorial etiologies, manifesting as persistent challenges in social interactions, restrictive interests, and repetitive behaviors. Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the most common human enzymopathy affecting red blood cell function. Although G6PD enzyme deficiency is known for its role in hemolytic anemia, emerging studies have suggested a potential association between G6PD deficiency and neurodegenerative and neurodevelopmental disorders, including autism. This narrative review explores the possible connection between G6PD deficiency and autism by analyzing relevant literature from the PubMed and Scopus databases. Current evidence points to plausible biological links, particularly oxidative stress and folate metabolism, warranting further investigation into G6PD deficiency as a potential risk modifier in ASD. Moreover, further research is necessary to elucidate the nature of this relationship and its implications for clinical practice.