Reveal younger-looking skin with just 1 tube of Crystal Retinal.* Containing next-generation retinAL (not retinol) which is clinically proven to act 11x faster than retinol,** to visibly smooth, brighten and firm skin. Available in 5 progressive clinical strengths. Find your most suitable starting strength and then climb the ladder for ever increasing visible results. Vampcore normcore faeriecore barbiecore balletcore Ladder up your visible age-defying results over time with Crystal Retinal's 5 progressive strengths - only at Medik8. Choose your strength: Strength 1 (0.01% retinal) - for very sensitive skins Strength 3 (0.03% retinal) - for beginners (most people start here) Strength 6 (0.06% retinal) - for regular retinoid users Strength 10 (0.1% retinal) - for advanced retinoid users Strength 20 (0.2%) - for experts Fast Wrinkle Reducing Power See clinically proven wrinkle reduction with just 1 tube* *Proven via independent clinical study on Crystal Retinal 6. Tested on 33 participants over 12 weeks. Professional-Grade Results Retinaldehyde is proven to work up to 11 times faster than classic retinol* - so you can see results sooner *G. Siegenthaler et al., Retinol and retinal metabolism, Biochemical Journal, 1990, 268, pp 371-378 Radiant, Youthful Skin Delivers remarkable visible improvement in texture, brightness, firmness & clarity Effective Results Until the Last Drop Thanks to Medik8's patented stability complex Customize Your Regimen With 5 Progressive Strengths