Retail $64 Discover youthful skin with Medik8 Crystal Retinal, the one-of-a-kind, ground-breaking serum that reinvented vitamin A skincare. Available in a series of progressive strengths to accompany you on your journey to Beautiful Skin For Life. Crystal Retinal 20 should only be used by those who have comfortably finished at least 2 tubes of Crystal Retinal 10, due to it containing a very high strength of retinaldehyde (0.2%). KEY BENEFITS Retinaldehyde is the star of Crystal Retinal; a next-generation form of vitamin A that is proven to deliver results up to 11x faster than retinol[1]. Yes, this is retinAL, faster-acting than retinol, the classic form of vitamin A. RESULTS Uniquely stabilized for optimum potency, Crystal Retinal is clinically proven to provide incredible results in just one tube: think visibly brighter, firmer, and smoother-looking skin. KEY INGREDIENTS Encapsulated Retinaldehyde, Patent-Pending Stabilisation System, Hyaluronic Acid, ​Vitamin E & Glycerin