All B Vitamins play an extremely vital role in metabolism. In their various actions, B Vitamins are closely interlinked so that they function like cogs of a wheel. Vitamin B1 contributes to the normal function of the heart, and is involved together with Vitamin B2, Vitamin B3, Vitamin B6, Vitamin B12 and Vitamin C in supporting normal functions of the nervous system. Pantothenic acid (Vitamin B5) contributes to a normal mental function. Biotin contributes to maintaining normal skin and hair. Vitamin B6 and B12 contribute to normal production of red blood cells that transport oxygen to the body cells. Folic acid plays a role in cellular division and is involved in the production of blood.