Description: Methylcobalamin+Niacinamide+Vitamin B6 (Pyridoxine), also known as MCB, is a formulation used in the treatment of nutritional deficiencies. These components are included for their roles in bioavailability and potential utilisation by the body. The actual mechanism of action is unclear, but it has been shown that supplementation with methylcobalamin leads to an increase in plasma homocysteine levels, which may form toxic compounds and bind with vitamin B12 molecules, thereby decreasing their absorption efficiency.