The B-complex vitamins are actually a group of eight vitamins that include Thiamine (B1), Riboflavin (B2), Niacin (B3), Pyridoxine (B6), Folic Acid (B9), Cyancobalamin (B12), Pantothenic Acid and Biotin. These vitamins are essential for the breakdown of carbohydrates into glucose (this provides energy for the body), the breakdown of fats and proteins (which aids in the normal functioning of the nervous system), muscle tone in the stomach and intestinal tract, and maintaining healthy skin, hair, eyes, mouth and liver. Doctors and nutritionists agree that taking the B-complex vitamins, as a group is essential for overall health. The b-complex vitamins together are a powerful tool in maintaining overall health. Individually, they each have important roles and specific targets to your body.