To purchase this product please call 0116 251 4848. Before purchasing Crystal Retinal 20, users should have completed 2 full tubes of Crystal Retinal 10, purchased from Dermacare Direct, before considering moving up to Crystal Retinal 20. - 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 - Clinically proven to provide incredible age-defying results in just one tube: think visibly brighter, firmer, and smoother-looking skinMedik8 Crystal Retinal™ 20 Only available for sale to customers living in the UK and Ireland To purchase this product please call 0116 251 4848. Before purchasing Crystal Retinal 20, users should have completed 2 full tubes of Crystal Retinal 10 before considering moving up to Crystal Retinal 20. Winner Of Best Retinol Product - Marie Claire Awards 2022! Crystal Retinal 20 sits at the top of the Crystal Retinal ladder, featuring 0.2% retinal. Crystal Retinal 20 is ex