This product is a combination of B vitamins used to treat or prevent vitamin deficiency due to poor diet, certain illnesses, alcoholism, or during pregnancy. Vitamins are important building blocks of the body and help keep you in good health. B vitamins include thiamine, riboflavin, niacin/niacinamide, vitamin B6, vitamin B12, folic acid, and pantothenic acid. Some brands of B vitamins also contain ingredients such as vitamin C, vitamin E, biotin, or zinc. Consult your doctor or pharmacist if you have questions about the ingredients in your brand.