Question: what are the roles and functions of different vitamins?
Answer: Vitamin A helps form and maintain healthy teeth, bones, soft tissue, mucous membranes, and skin. Vitamin B6 is also called pyridoxine. ...  Vitamin B12, like the other B vitamins, is important for metabolism. ...  Vitamin C, also called ascorbic acid, is an antioxidant that promotes healthy teeth and gums.