This fast-acting 0.3% Retinol night serum accelerates skin surface cell renewal with Retinol that penetrates up to 15 surface layers deep into the skin. Experience visible reduction of fine lines in just 5 days, and visible improvement in deep wrinkles in 2 weeks. To ensure maximum efficacy, its innovative packaging isolates a high concentration of pure Retinol powder so it can be freshly mixed into the serum upon first use. With continuous use, this night serum with Retinol helps skin look renewed for a visibly smoother, more youthful appearance. TEST RESULTS Before and After Before and After Retinol Serum Our efficacious Retinol night serum helps visibly smooth areas prone to lines and wrinkles like the forehead, cheek, and around the mouth. With continuous use, experience accelerated, visibly youth-boosting results(1). (1) 100% Showed Reduction in Wrinkles COMPOSITION PURE RETINOL Our formula with Pure Retinol helps steadily accelerate skin surface turnover to bring new, fresh skin to the surface to help address visible signs of aging for skin that's visibly renewed and youthful looking. The Retinol Fast Release Wrinkle-Reducing Night Serum by Kiehl's is a powerful and innovative serum, designed to visibly reduce the appearance of fine lines and encourage firmer-looking skin.A unique chamber system within the bottle isolates a high concentration of pure retinol powder, that can be freshly mixed into the serum upon each application to help ensure maximum efficacy. With continuous use, the skin appears smoother, with fewer textural irregularities and a more even tone. This fast-acting 0.3% Retinol night serum accelerates skin surface cell renewal with Retinol that penetrates up to 15 surface layers deep into the skin. Experience visible reduction of fine lines in as little as 5 days, and visible improvement in deep wrinkles in 2 weeks. To ensure maximum efficacy, its innovative packaging isolates a high concentration of pure Retinol powder so it can be freshly mixed into the serum upon first use. With continuous use, this night serum with Retinol helps skin look renewed for a visibly smoother, more youthful appearance. Benefits: • Retinol penetrates up to 15 surface layers deep • Accelerated skin surface cell renewal in as little as 5 days • Visible reduction of fine lines in as little as 5 days • Visible reduction of wrinkles, including deep wrinkles in 2 weeks • Innovative packaging that separates a high conce...