Retinol 6TR? resurfaces to rejuvenate skin and restore the skin at night. Vitamin A improves skin texture, skin tone and helps the appearance of fine lines and wrinkles. Using Time Release Technology, retinol is delivered gradually into the deeper layers of the skin throughout the night to ensure results without irritating skin. A fast-absorbing serum is the next step for those who have already been using retinol in their regime and are looking for a higher strength.