Methods | Statistics | Clinical | Educational | Industrial |
Professional items | World psychology | Vitamin A is an
essential human nutrient. It may be found in any of these forms:
- retinol, the animal form of vitamin A, is a yellow fat-
soluble, antioxidant vitamin with importance in vision and bone
growth, it belongs to the family of chemical compounds known as
retinoids. - other retinoids, a class of chemical compounds that
are related chemically to vitamin A, are used in medicine. -
carotenoids or other substances that enable the body to
synthesize retinoids. Carotenoids are organic pigments that are
naturally occurring in plants and some other photosynthetic
organisms like algae, some types of fungus and some bacteria.
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