Take your vitamin A to the next level. Crystal Retinal™ is an advanced age-defying serum formulated with stabilised retinaldehyde (retinal) - a next-generation vitamin A derivative that works 11x faster than retinol. Expertly stabilised to ensure maximum potency and effectiveness, this groundbreaking overnight serum visibly reduces the appearance of fine lines and wrinkles for a firmer and more youthful-looking complexion. Featuring industry-leading encapsulation technology to ensure gentle yet powerful results - even on sensitive skin. Recommended by professionals and dermatologists worldwide, Medik8 offers progressive concentrations of Crystal Retinal products which form the Medik8 Crystal Retinal Ladder. Crystal Retinal 20, containing 0.2% retinaldehyde, is for advanced vitamin A users only. 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 retinal (0.2%). KEY BENEFITS -