Vitamin B12 (cobalamin) has a vital role in the proper functioning of the body as it contributes to the normal functioning of the nervous and immune system and metabolic processes aimed at energy production and the reduction of tiredness and fatigue. Necessary for the formation of red blood cells in blood with hemoglobin carry oxygen around the body. At the same time contributes to normal psychological function and appears to be useful in cases of depression, such as supporting scientific studies, it was observed that 30% of patients hospitalized for depression are deficient in vitamin B12. It also contributes to normal metabolism of homocysteine. If high levels of homocysteine, which is responsible for the occurrence of cardiovascular events, the B12 positive contribution to metabolism.