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Vitamin B12 overview for health professionals. Research health effects, dosing, sources, deficiency symptoms, side effects, and interactions here.
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Table of Contents. What is vitamin B12 and what does it do?...
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What is vitamin B12 and what does it do? Vitamin B12 is a nutrient that helps keep your body’s blood and nerve cells healthy and helps make DNA, the genetic material in all of your cells. Vitamin B12 also helps prevent megaloblastic anemia, a blood condition that makes people tired and weak. How much vitamin B12 do I need?
Table of Contents. What is vitamin B12 and what does it do? How much vitamin B12 do I need? What foods provide vitamin B12? What kinds of vitamin B12 dietary supplements are available? Am I getting enough vitamin B12? What happens if I don’t get enough vitamin B12? What are some effects of vitamin B12 on health? Can vitamin B12 be harmful?
Vitamin B12 is a water-soluble vitamin that is naturally present in some foods, added to others, and available as a dietary supplement and a prescription medication. Vitamin B12 exists in several forms and contains the mineral cobalt [1-4], so compounds with vitamin B12 activity are collectively called "cobalamins".
Vitamin B12 is the largest and most complex of all the vitamins. Vitamin B12 comprises the only cobalt-containing molecules (so-called cobalamins), with biological activity in humans. The cobalt gives this water-soluble vitamin its red color.
This fact sheet provides information on how much vitamin B12 you need and how to check if you get enough vitamin B12 in your diet. 1. Find out how much vitamin B12 you need. Adults older than 50 years: Older adults do not absorb naturally occurring vitamin B12 very well.
Fact Sheet for Consumers. Foods from animals, but not plants, naturally have vitamin B12. These include fish, meat, poultry, eggs, milk, and other dairy products. National Institutes of Health. Ofice of Dietary Supplements. What is vitamin B12 and what does it do?
