No.1 Retinal Serum Worldwide*

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Reveal younger-looking skin with just 1 tube of Crystal Retinal.[2]
This iconic vitamin A night serum contains next-generation retinAL, clinically proven to act 11x faster than standard retinOL[3] to visibly smooth, brighten, decongest and firm your skin.

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Deluxe Sample Crystal Retinal 10 Deluxe Sample Crystal Retinal 10

0.10% Retinal- Advanced strength

Real People. Real Results.

*Source: independent market research by Kline & Company analysing manufacturer-level retinal serum sales between December 2024 and November 2025. To verify, visit: medik8.com/claims
[2]Proven via independent clinical study on Crystal Retinal 6. Tested on 33 participants over 12 weeks.
[3]Shorter reference (for visual content/assets): Biochem J., 1990, 268, pp 371-378
*Proven via independent clinical study on Crystal Retinal 6. Tested on 33 participants over 12 weeks.
*Proven via independent clinical study on the Crystal Retinal ladder tested on 30 participants over 24 weeks.
*Proven via independent clinical study on Crystal Retinal 6. Tested on 33 participants over 12 weeks.