- Vitamin | Definition, Types, Facts | Britannica
Vitamin, any of several organic substances that are necessary in small quantities for normal health and growth in higher forms of animal life Vitamins generally cannot be synthesized in amounts sufficient to meet bodily needs and therefore must be obtained from the diet or from some synthetic source
- Vitamins and Minerals From A to Z - WebMD
Find out from WebMD's slideshow which vitamins and minerals your body needs, what they do, and what foods you can eat to get them
- What are vitamins, and how do they work? - Medical News Today
Vitamins are essential to human health Here, learn about each of the 13 vitamins, including good sources and how they help Learn more here
- Vitamins and Minerals - The Nutrition Source
Vitamins are organic substances that are generally classified as either fat soluble or water soluble Fat-soluble vitamins (vitamin A, vitamin D, vitamin E, and vitamin K) dissolve in fat and tend to accumulate in the body
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