This review brings together human and animal studies and reviews that examine the possible role of maternal vitamin B12 (B12) on fetal growth and its programming for susceptibility to chronic disease.

Vitamin B12 is typically well-tolerated, but in very rare cases, there are serious side effects to be aware of. Learn more about them here.

Vitamin B12 is essential to your body, but some people find it hard to maintain healthy levels without the help of a B12 supplement. Not everyone needs to supplement B12, but you should do so if you ...