Vitamin B12 (Cobalamin) is a water-soluble vitamin, found naturally in a wide variety of animal foods (meats, fish, poultry, eggs, and dairy). Vitamin B12 helps convert food into glucose, which gives energy. Vitamin B12 increases the metabolism of fats and glucose, boosting energy production, which in turn decreases weight gain by muscle production and fat loss. It also helps in the production of red blood cells and DNA, as well as the proper functioning of the central nervous system. It promotes high levels of neurotransmitters such as serotonin and dopamine, preventing depression and emotional eating.