Vitamin B12, also known as cobalamin, is an essential vitamin that your body needs but cannot produce.
It’s found naturally in animal products, but also added to certain foods and available as an oral supplement or injection.
Vitamin B12 has many roles in your body. It supports the function of your nerve cells and is needed for red blood cell formation and DNA synthesis.
For most adults, the recommendedTrusted Source dietary allowance (RDA) is 2.4 micrograms (mcg), though it’s higher for people who are pregnant or nursing.
Vitamin B12 supplements may benefit your body and overall health in different ways, from helping your eyes and mind to benefiting your bones, hair, and skin.
Here are some possible health benefits of vitamin B12, all based on science.
