Vitamin B12 is water-soluble and is the only B vitamin that can be stored in the body in significant amounts, mainly in the liver. Vitamin B12 deficiencies may result from decreased absorption of vitamin B12 from the intestine, or from a strict vegetarian diet, since the vitamin is found primarily in foods of animal origin.

An essential nutrient and a member of the B complex family of vitamins, vitamin B12 acts as a factor for the maintenance of good health. Vitamin B12 aids folic acid in helping to form red blood cells. It also helps support healthy metabolism and helps in energy metabolism in the body.