價格：免費
更新日期：2018-09-19
檔案大小：2.8M
目前版本：2.1.2
版本需求：Android 4.0 以上版本
官方網站：mailto:faizimran789@gmail.com
Email：http://medivacapp.blogspot.com/2018/06/privacy-policy.html
Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol, retinal, retinoic acid, and several provitamin A carotenoids (most notably beta-carotene).[1][2] Vitamin A has multiple functions: it is important for growth and development, for the maintenance of the immune system and good vision.[3][4] Vitamin A is needed by the retina of the eye in the form of retinal, which combines with protein opsin to form rhodopsin, the light-absorbing molecule[5] necessary for both low-light (scotopic vision) and color vision.[6] Vitamin A also functions in a very different role as retinoic acid (an irreversibly oxidized form of retinol), which is an important hormone-like growth factor for epithelial and other cells.[4][7]
In foods of animal origin, the major form of vitamin A is an ester, primarily retinyl palmitate, which is converted to retinol (chemically an alcohol) in the small intestine. The retinol form functions as a storage form of the vitamin, and can be converted to and from its visually active aldehyde form, retinal.
Application provides following Features
========================================
Easy to Use
Friendly GUI
Free of Cost