The nutritional term Vitamin A describes a family of essential compounds that are structurally related. This family includes retinol, retinal or retinaldehyde, retinyl esters, retinoic acid, and provitamin carotenoids such as carotene.
Vitamin A is vital in the formation of healthy skin cells and regulates epidermal cell growth. Applied topically, Vitamin A smoothes dry, thick, rough skin and improves elasticity by preventing connective tissue atrophy. Studies indicate that Vitamin A can increase collagen synthesis and epidermal thickness as well as treat dermatological disorders such as acne, follicular and lesion papules, actinic keratosis, oily skin, and rosacea.