Argansus Bio Skin Care Retinol Lifting Serum, moisture enhancing nourish. Retinol is a general term for Vitamin A. Asa fat-soluble alcohol that promotes collagen production, it can increase skin elasticity, smooth and lighten the skin, and remove fine line. Retinol os a cellular communication component and antioxidant which has function of regulating the metabolism of the epidermis and stratum coneum so as to help defend aging.