Most vitamins are not single molecules, but groups of related molecules called vitamers. For example, there are eight vitamers of vitamin E: four tocopherols and four tocotrienols. The …

Nov 22, 2025 · 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 …

Aug 23, 2022 · 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 …

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 …

Jul 17, 2024 · Vitamins are substances that your body needs to grow and develop normally. There are 13 vitamins your body needs; Each has specific jobs.

Sep 4, 2025 · Vitamins are essential nutrients that help with many body functions, including metabolism and energy. There are two types of vitamins: fat-soluble and water-soluble, each …

Sep 16, 2024 · Vitamins are made by plants and animals, while minerals come from the soil and water — both of which are essential for our bodies.

Aug 22, 2023 · Learn about the 13 essential vitamins your body needs for proper function, their roles, and how to get them through a balanced diet. Plus, the risks of vitamin deficiencies and …

Oct 5, 2023 · 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.

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.