| Major Functions | Vitamin |
| Blood clotting Bone health (coenzyme) | |
| Energy metabolism (coenzyme) | |
| Carbohydrate metabolism (coenzyme) | |
| Bone formation Enzymes | |
| Collagen syn. Antioxidant Iron absorption | |
| Hemoglobin Energy metabolism Brain function | |
| Blood glucose regulation Insulin function | |
| Vision Eye and skin health | |
| Strengthens tooth enamel Prevent tooth decay | |
| Fat-soluble Antioxidant vitamin | |
| Red blood cell formation (coenzyme) | |
| Bones, muscles, and nerve health Stored in bones Most abundant mineral in body | |