Vitamin B12, also known as cyanocobalamin, is the only water-soluble vitamin that contains a metalloid element. Vitamin B12 is very important for the health of the body and has the following two roles: 1. Vitamin B12 can reduce the level of homocysteine in the blood, which is an independent risk factor for the development of cardiovascular disease, and proper consumption of vitamin B12 has good benefits in preventing cardiovascular disease by reducing homocysteine. 2. The role of vitamin B12 in preventing the occurrence of anemia can also be very obvious.