Vitamin
A (All-trans-Retinol)
Vitamin A is a fat soluble vitamin derived from 
-carotene. The
alcohol form of vitamin A, retinol, is the storage
form in the body. The aldehyde form, retinal,
has a role in vision. The acid form, retinoic
acid, functions in embryonic development. Vitamin A
acts to some extent in the body as an antioxidant, protecting
against oxidative damage.
See also: Antioxidants,
Reactive Oxygen,
Oxygen Metabolism
and Human Disease, -Carotene, G
Proteins in Vision, Lipid-Soluble
Vitamins, Vitamins
INTERNET LINKS:
1. Retinol
Metabolism
2. Rod
Photoreceptor