Doctors recommend vitamin and mineral supplements to infants, children, young adults, pregnant women, menopausal women and elderly for various purposes. Vitamins A, B, C, D, E, K and minerals like copper, calcium, iron, from our food help strengthen our immune system, teeth and bones. They help enhance the function of the nervous system (rather, of every system in the body), make the muscles powerful and they also promote proper growth of the fetus in the womb. These are the nutrients which help generate energy, or boost your energy, and improve your overall health.