Vitamins and minerals are micronutrients required by the body to carry out a range of normal functions. However, these micronutrients are not produced in our bodies and must be derived from the food we eat. Vitamins are organic substances that are generally classified as either fat soluble or water soluble.
Very few foods naturally have vitamin D. Fatty fish such as salmon, tuna, and mackerel are among the best sources. Fortified foods like milk provide most of the vitamin D in American diets.

This particular example perfectly highlights why Vitamin A Rich Guinea Pig Food is so captivating.
Learn about the functions that each vitamin and mineral performs in the body. Discover what minerals your body needs to stay healthy and work properly. Learn what vitamins your body needs and where to find them in foods. Explore an A to Z list of fact sheets for vitamin and mineral supplements.
This article explains what vitamins are, what they do, and which foods are good sources. Follow the links in blue below for more information about each vitamin.