RoCs Retinol Correxion Deep Wrinkle Serum visibly reduces deep, set-in wrinkles that can be difficult to treat. This light, silky formula works in as little as 4 weeks, delivering powerful results without irritation. With RoCs Retinol Correxion Deep Wrinkle Serum, 100% had visibly more radiant, younger-looking skin. Made with pure RoC Retinol, Americas #1 Most Awarded Retinol*, and our exclusive mineral complex for additional hydration & enhanced Retinol efficacy. This serum works to complement skins renewal process and bring fresher, revitalized-looking skin to the surface. The longer you use it - the more dramatic age-defying results you will see. Use in the AM and/or PM after cleansing. Apply to face and neck. Begin applying this product every other night and then gradually increase frequency. Apply a sunscreen of SPF15 or higher during the day while using this product. *Based on a 3rd party study using publicly available data sources from publications and media sources hosting beauty awards since 2010*