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 stabilised for optimum potency, Crystal Retinal is clinically proven to provide incredible age-defying results in just one tube: think visibly brighter, firmer and smoother-looking skin.