Tablet is a supplement of vitamin B12. It is used to treat low levels of vitamin B12 in your body. Vitamin B12 is essential in the formation of red blood cells and helps in the absorption of iron in the body. It also helps your body use fat and carbohydrates for energy and make new protein. In combination with other vitamins, it helps in strengthening the immune system, improves the metabolism of the body, and is important for the nervous system.