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? The amount of vitamin B12 you need each day depends on your age.
Why vitamin B 12 is important The human body needs vitamin B 12 to make red blood cells, nerves, DNA, and carry out other functions. The average adult should get 2.4 micrograms a day. Like most vitamins, B 12 can’t be made by the body. Instead, it must be gotten from food or supplements.
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