Maternal supplementation of vitamin B 12 in predominantly vegetarian pregnant women improves their vitamin B 12 status and the neurodevelopment of their infants: the MATCOBIND multicentric double-blind randomised control trial

Daily supplementation with 250 µg of vitamin B₁₂ during pregnancy in vegetarian mothers significantly improved infant mental DQ and maternal B₁₂ status compared with a 50 µg dose.