Carotene and others: Many proteins, and enzymes are involved in vitamin a metabolism. Some proteins are involved in creating the useful form of vitamin a into 11-cis-retina from vitamin a or b-carotene, which is useful in vision. Some proteins transport vitamin a , such as retinol binding protein. Many nutrients important such as zinc, lipids, carotenes. Age related eye study vitamins: ww.Areds2.Org.
Answered 7/7/2015
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