BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Vitamin A comes from two sources. One group, called retinoids, comes from animal sources and includes retinol. The other group, called carotenoids, comes from plants and includes beta-carotene. The body converts beta-carotene to vitamin A.

Detailed explanation-2: -Vitamin A (retinol, retinoic acid) is a nutrient important to vision, growth, cell division, reproduction and immunity. Vitamin A also has antioxidant properties.

Detailed explanation-3: -Retinol increases skin cell production (proliferation). It helps unclog pores. Retinol also exfoliates your skin and increases collagen production, which can reduce the appearance of fine lines and wrinkles, giving your skin a fresher, plump appearance.

Detailed explanation-4: -The two main forms of vitamin A in the human diet are preformed vitamin A (retinol, retinyl esters), and provitamin A carotenoids such as beta-carotene that are converted to retinol. Preformed vitamin A comes from animal products, fortified foods, and vitamin supplements. Carotenoids are found naturally in plant foods.