Key Benefits 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 Customise Your Routine With 5 Progressive Strengths A retinal strength for beginners to expert users - even sensitive skin