Vitamin B-12, also known as cyanocobalamin, is a water-soluble vitamin that plays a critical role in proper energy metabolism, helping to break down some fatty acids and amino acids to produce energy. It is also necessary for DNA synthesis, red blood cell development, immune function, nerve function, and the production of neurotransmitters. Vitamin B-12, along with folic acid and vitamin B6 help reduce levels of homocysteine, an amino acid derivative that can be harmful to the cardiovascular and neurological system when present in excess. High levels of homocysteine have also been implicated in osteoporosis and are toxic to brain cells.These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.