Stable Retinal Night Serum Ultra-Strength Vitamin A A high-performance anti-ageing serum for those looking to boost the results of Crystal Retinal 6. We strongly recommend starting on lower strengths of Crystal Retinal if you have not used retinaldehyde before. 0.10% Encapsulated Retinaldehyde.Supercharge the results of your night-time regime. Reducing the appearance of fine lines in just 4 weeks,3 Crystal Retinal boosts skin�s natural collagen production to resurface and renew the complexion. The innovative formula has all the anti-ageing, radiance-boosting and clarifying benefits of retinol, plus the same low irritation. But armed with high-performance retinal, it is able to provide visible results up to 11x faster. The naturally peach-coloured serum-cream sinks effortlessly into skin to nurture and smooth the complexion. Featuring a natural comforting aroma of vanilla and tonka bean, it leaves skin strengthened, hydrated and ready for overnight rejuvenation.