Vitamins
Vitamins are organic compounds essential for normal metabolism, growth and well-being. They usually are available from food, although some can be produced synthetically.
Minerals
Minerals are found naturally in foods and are essential to many basic tasks the body must perform. They are especially important for bone structure and growth. Some minerals found naturally in foods are calcium, iron, phosphorus, magnesium, potassium and sodium. In nutritional supplements, minerals are not present in elemental form, but rather as compounds. For example, a dietary supplement product may say "ferrous sulfate", which is iron.