It is composed of methylcobalamin, the active form of vitamin B12, in a liquid dosage matrix for fast action and easy absorption. Meat, fish, and dairy products are excellent sources of vitamin B12; so people who choose vegetarian or vegan lifestyles, or those who suffer from intestinal malabsorption, may need other sources of this vitamin. Vitamin B12 contributes to normal energy metabolism, the proper functioning of the immune system, the nervous system and the correct psychological function. It favors the normal formation of red blood cells, helps to reduce tiredness and fatigue and participates in the process of cell division. Contributes to the normal metabolism of homocysteine, an amino acid related to cardiovascular well-being.