Association between vitamin B12 deficiency and risk of Paediatric narcolepsy: Evidence from cross-sectional study and Mendelian randomization analysis

Narcolepsy, a chronic neurologic sleep disorder, has sparked growing interest in the potential role of vitamin B12 in its pathogenic mechanism. However, research on this association has predominantly focused on adults. Our objective was to delineate the phenotypic and genetic connections between serum vitamin B12 levels and paediatric narcolepsy.