Vitamin B12 , also called cobalamin, is a water-soluble vitamin with a key role in the normal functioning of the brain, nervous system, and the formation of red blood cells. It is one of the eight B vitamins. It is involved in the metabolism of every cell in the human body, especially affecting the synthesis and regulation of DNA, but also in the metabolism of fatty acids and amino acids. How to use 1 or 2 ml directly in the mouth, you can also mix it in a glass of water or juice, but never mix it with hot drinks. Follow the recommendations of your health professional. Shake before using.