Essence Nutrition B12 is a dietary supplement in the form of tablets containing vitamin B12 in the form of methylcobalamin. What are the functions of vitamin B12? Methylcobalamin is one of the active forms of vitamin B12 and has important functions in biochemical transformations. It participates in the formation of myelin sheaths, neurotransmitters and in the transformation of purines and pyrimidines (which occur in nucleic acids). Shows active participation in the biosynthesis of the neurotransmitter serotonin and choline - components of the phospholipids of the myelin sheath of the nerves. It also plays a role in the metabolism of folic acid responsible for proper DNA and RNA synthesis. It also participates in the maturation of red and white blood cell precursors and in hemoglobin metabolism. So what action does vitamin B12 show in our body? Vitamin B12 contributes to maintaining normal energy metabolism and to reducing tiredness and fatigue. This is especially important for people who lead an active lifestyle. This vitamin helps in the proper functioning of the nervous system, as well as in maintaining normal psychological functions. In addition, it helps maintain normal homocysteine metabolism, in the proper production of red blood cells and plays a role in cell division. It is also important that in moments of weakening the immune system, it is worth reaching for vitamin B12, because it helps in the proper functioning of the immune system.