Unilife-A

Vitamin A is a fat-soluble vitamin and an essential nutrient for humans. It is a group of organic compounds that includes retinol, retinal (also known as retinaldehyde), retinoic acid, and several provitamin A carotenoids (most notably beta-carotene (β-carotene).[2][3][4][5] Vitamin A has multiple functions: it is essential for embryo development and growth, for maintenance of the immune system, and for vision, where it comb... [wikipedia]