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 …

3 days ago · Ascorbic acid, the scientific name for vitamin C, supports immune function. Eating ascorbic acid-rich foods helps your immune system work properly.

Aug 8, 2025 · What are B vitamins? What does each B vitamin do? Should I take a B vitamin? Taking care of your health requires a comprehensive approach, focusing on regular …

Jan 21, 2025 · 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 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 …

5 days ago · While its reputation is at times dismissed as folklore or the efforts of orange juice marketing campaigns, vitamin C’s benefits are rooted in biology.

A recent look at multivitamins by Johns Hopkins researchers shows that there’s no proof of benefit. Find out the one supplement deemed beneficial—and how others failed.

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.

Nov 29, 2023 · 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 …