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Nature Reviews Cardiology 3, 351 (1 July 2006) | doi:10.1038/ncpcardio0569

Folic acid and B vitamins fail to reduce major cardiovascular risk

The Heart Outcomes Prevention Evaluation (HOPE) 2 Investigators (2006) Homocysteine lowering with folic acid and B vitamins in vascular disease. N Engl J Med 354: 1567–1577 Observational data have indicated that raised homocysteine levels could increase cardiovascular risk.