Vitamin B12 is an essential water soluble vitamin that is commonly found in a variety of foods such as fish, shellfish, meats, and dairy products. Vitamin B12 is frequently used in combination with other B vitamins in a vitamin B complex formulation. 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. Hydrochloric acid in the stomach releases B12 from protein during digestion and once released, B12 combines with a substance called intrinsic factor (IF) before it is absorbed into the bloodstream. Vitamin B12 is also noted to help to increase energy levels and may aid in anemia by working in conjunction with iron. Printable Brochure