what do b12 vitamins do/hse
Vitamin B12 is a nutrient that helps keep the body's nerve and blood cells healthy and helps make DNA, the genetic material in all cells. Vitamin B12 also helps prevent a type of anemia called megaloblastic anemia that makes people tired and weak.Two steps are required for the body to absorb vitamin B12 from food.First, hydrochloric acid in the stomach separates vitamin B12 from the protein to which vitamin B12 is attached in food.lant foods have no vitamin B12 unless they are fortified. You can get recommended amounts of vitamin B12 by eating a variety of foods including the following: 1  Beef liver and clams, which are the best sources of vitamin B12. 2  Fish, meat, poultry, eggs, milk, and other dairy products, which also contain vitamin B12.