Vitamin b-12 (Cyanocobalamin) is a water soluble vitamin necessary for the maintenance of a healthy nervous system and for the production of energy from fats and proteins. Vitamin b-12 is also essential for the synthesis of dna during cell division and therefore is especially important for rapidly multiplying cells, such as blood cells. In addition, adequate intake of vitamin b-12, along with folic acid and vitamin b-6, is critical for the conversion of homocysteine to methionine, thereby supporting a healthy cardiovascular system. While b-12 is stored in the liver, dietary sources are of animal origin only (Meat and dairy). Therefore, supplementation with b-12 may be especially important for strict vegetarians.