Vitamin A
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Vitamin A (or Vitamin A Retinol, retinal, and four carotenoids including beta carotene) is a vitamin that is needed by the retina of the eye in the form of a specific metabolite, the light-absorbing molecule retinal, that is necessary for both low-light (scotopic vision) and color vision. Vitamin A also functions in a very different role as an irreversibly oxidized form of retinol known as retinoic acid, which is an important hormone-like growth factor for epithelial and other cells.
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| vitaminA.org vitaminA.org www.vitaminA.org - Web |
| The Micronutrient Initiative The Micronutrient Initiative www.micronutrient.org/english/view.asp?x=1 - Web |
| UNICEF UNICEF www.unicef.org - Web |
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| Helen Keller International Helen Keller International www.hki.org - Web |
| A2Z A2Z www.a2zproject.org - Web |
| World Health Organization Database on Vitamin A De... World Health Organization Database on Vitamin A Deficiency www.who.int/vmnis/vitamina/data/en/index.html - Web |
