Vitamin B12, like other B vitamins, is a water-soluble vitamin. Trophic's Mega B12 functions as a coenzyme and is involved in the synthesis of the essential amino acid methionine.

In the body, Vitamin B12 is used in the regulation and formation of red blood cells and helps in the utilization of iron. It helps convert carbohydrates into fat and must be available in the system as it is involved in the formation of red blood cells. Vitamin B12 is absent from most fruits, vegetables and grains.