Vitamin B12 is a nutrient your body cannot do without for efficient, healthy metabolism of fats and carbohydrates. Methylcobalamin does not require metabolic/conversion by the liver, thus making it instantly ready for the body to use. In addition to the Methylcobalamin form of B12 we have also included the active forms of Folic Acid (Methylfolate). Vitamin B12, vitamin B12 or vitamin B12, also called cobalamin, is a water-soluble vitamin that has a key role in the normal functioning of the brain, nervous system and the formation of red blood cells.