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USA 106 , 2138321388 (2009)

"Maternal vitamin B12 status and risk of neural tube defects in a population with high neural tube defect prevalence and no folic Acid fortification"

Split dosing may help if: single morning dose produces effects that fade by afternoon, you are using higher doses (450-500mcg) where sustained levels may help, or evening administration fits your schedule better than early morning

Neither peptide has been studied in pregnancy, lactation, or pediatric populations

Experts highlighted the need for healthcare education on recognizing B12 deficiency symptoms and suggested targeted prophylactic supplementation for high-risk groups

The Homocysteine Connection But there's another important piece to this puzzle: an amino acid called homocysteine