Vitamins are essential organic compounds that our bodies need in small amounts to function properly. They play crucial roles in various bodily processes, including metabolism, immunity, and cell growth. There are 13 essential vitamins, including A, C, D, E, K, and the B-complex group. Each vitamin has specific functions and benefits, such as Vitamin C for immune support and Vitamin D for bone health. A balanced diet typically provides the necessary vitamins, but supplements can help fill any gaps.