Reveal younger-looking skin with just 1 tube of Crystal Retinal, the retinal facial serum that transforms your nightly skincare routine. Our iconic age-defying vitamin A night serum is clinically proven to visibly smooth stubborn facial 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.[2]And, unlike others, our patented retinal stability system ensures unmatched retinal potency and effectiveness until the very last drop. Fast Wrinkle Reducing Power Clinically proven wrinkle reduction in just 1 tube[1] Professional-Grade Results Retinaldehyde is proven to work up to 11 times faster than standard retinol[2] Radiant, Youthful Skin Delivers remarkable visible improvement in texture, brightness, firmness & clarity Customize Your Regimen With 6 Progressive Strengths A retinal strength for beginners to expert users - from beginners (0.01%) to expert (0.24%) users Effective Results Until the Last Drop Thanks to Medik8's patented stability complex PROVEN RESULTS