Fast Release Wrinkle-Reducing 0.3% Retinol Night Serum - FAST RELEASE RETINOL SRM 30ML 1.0OZBenefitsKiehl's 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 lookingRetinol penetrates up to 15 surface layers deep* immediatelyVisible reduction in fine lines in just 5 days** with use of this anti aging retinol night serumVisible reduction in deep wrinkles in 2 weeks*** revealing smoother skinInnovative packaging that isolates a high concentration of pure retinol powder so it can be freshly mixed into the serum upon first use for maximum efficacyBottle made with 100% recycled materialFormulated WithoutParaben freeMineral-oil freeFragrance freeDye freeSilicone freeResearch ResultsResults are based on expert grading in a 10-week clinical study:Visibly smooths skin immediately by penetrating up to 15 surface layers deep*Visibly reduces fine lines and wrinkles in 5 days**Visibly reduces deep wrinkles in 2 weeks***100% showed reduction in wrinkles* Based on an in vivo penetration test for retinol penetration** Based on expert grading in a 10-week clinical study of 71 panelists*** Based on expert grading in a 10-week clinical study of 27 panelists - Fast Release Wrinkle-Reducing 0.3% Retinol Night Serum