Reveal younger-looking skin with just 1 tube of Crystal Retinal. Our iconic vitamin A night serum is clinically proven to visibly smooth stubborn wrinkles, brighten dark spots, decongest and firm your skin - without irritation.[1] Crystal Retinal contains retinal; a next-generation vitamin A which acts 11x faster than standard retinol and, unlike others, our patented retinal stability system ensures unmatched retinal potency and effectiveness until the very last drop. It’s no wonder Crystal Retinal is the UK’s No.1 dermatological face serum.