This silicone based serum was designed to deliver a highly effective dose of retinol. Retinol improves the appearance of fine lines and wrinkles & protects the skin against photo aging. Fans of this formulation report the skin feeling soft and supple. Use at night on face and neck after cleansing the skin. Do not use if pregnant or breastfeeding. Be sure to use sunscreen when using any retinol. 1oz.