Vitamin B12, also called cobalamin, is a water soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood.
Vitamin B-12 is an essential vitamin that is commonly found in a variety of foods such as fish, shellfish, meat, and dairy products. It helps maintain healthy nerve cells and red blood cells and is also needed to make DNA, the genetic material in all cells. Vitamin B12 is bound to the protein in food.