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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. All vertebrates, including humans, require dietary sources of vitamin A, vitamin D, thiamin, riboflavin, vitamin B 6, and pantothenic acid; some vertebrates, particularly the more highly evolved ones, have additional requirements for other vitamins. Vitamins have diverse biochemical functions. Vitamin A acts as a regulator of cell and tissue growth and differentiation. Vitamin D provides a hormone-like function, regulating mineral metabolism for bones and other organs. The B complex vitamins function as enzyme cofactors (coenzymes) or the precursors for them. One type comes from animal sources of food. It helps you see at night, make red blood cells, and fight off infections. The other type is in plant foods. It helps prevent damage to cells and an eye. B vitamins are essential for health, supporting energy production, DNA synthesis, and blood cell formation. 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. There are 13 essential vitamins. This means that these vitamins are required for the body to work properly. They are: Vitamins are grouped into two categories: Fat-soluble vitamins are stored in the body's liver, fatty tissue, and muscles. The four fat-soluble vitamins are vitamins A, D, E, and K. 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. Creatine is a major multi-tasker! What dietitians want you to know about this secret weapon for shedding excess body fat. Should You Be Taking a Magnesium Complex? This micronutrient has macro benefits, from lower blood sugar to better sleep—find out if it's right for you. Vitamins are nutrients that are found in the foods we eat. They’re needed for functions such as growth, metabolism, and nervous system activities. Often, a health-promoting diet can provide all.

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