In one retrospective analysis of anemia in pregnancy, researchers compared pregnant women who were taking high vitamin B12, high folic acid food with those who were taking standard prenatal food with low vitamin B12, low folic acid. The women in the vitamins-enriched prenatal balanced diet group had significantly higher hemoglobin levels at delivery than those in the standard prenatal food group
However, not all providers offer the same level of medical oversight or ingredient quality
USA 103 , 62186223 (2006)
[DOI] [PubMed] [Google Scholar] 142.El-Ghannam AR, Ducheyne P, Risbud M, Adams CS, Shapiro IM, Castner D, et al
Intravenous cyanocobalamin (1,000 g/day) was administered for 21 days
But some people need to take vitamin B12 supplements to prevent or treat a deficiency