Medik8 CRYSTAL RETINAL 6™ - 30ml


Stable Retinal Night Serum Super-Strength Vitamin A
Perfect for those who are wanting to upgrade their high-strength retinol results.
0.06% Encapsulated Retinaldehyde

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Medik8 Crystal Retinal 6, a hydrating serum made with 0.06% encapsulated retinaldehyde for a hydrated and more youthful-looking complexion. 

Use the Medik8 Crystal Retinal 6 as part of an evening skincare routine. Formulated with glycerine and hyaluronic acid, it delivers a powerful hydrating effect to help soften and smooth the skin, allowing it to awaken refreshed and radiant.

The advanced complex is powered by 0.06% encapsulated retinaldehyde, a form of vitamin A that works 11 times faster than retinol to target the look of pigmentation, fine lines and wrinkles for a smooth, even complexion. With stabilising vitamin E, the serum is rich in antioxidants, protecting the skin against the damaging effects of free radicals.

  • Key Benefits
    • Crystal Retinal 1

      Stable Retinal Night Serum Gentle-Strength Vitamin A
      Our entry level gentle-strength vitamin A, is ideal for those who have really sensitive skin or are looking to incorporate a low strength but highly effective vitamin A serum in their routine.
      0.01% Encapsulated Retinaldehyde.

    • ​Crystal Retinal 3

      Stable Retinal Night Serum Medium-Strength Vitamin A
      The entry point for those who are new to vitamin A or have tried mild retinol formulas and the answer to those looking to prevent early signs of skin ageing.
      0.03% Encapsulated Retinaldehyde.

    • Crystal Retinal 6

      Stable Retinal Night Serum Super-Strength Vitamin A
      Perfect for those who are wanting to upgrade their high-strength retinol results.
      0.06% Encapsulated Retinaldehyde.

    • ​Crystal Retinal 10

      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.

    • Crystal Retinal 20

      The latest professional addition to the award-winning Crystal Retinal family, now in 0.2% retinaldehyde strength.

      Only available in clinics after consultation. You should be comfortably using Crystal Retinal 10 every night for 3 months or completed 2 full tubes before you consider moving up.

      Find out more here.

  • How It Works

    Clinical-grade vitamin A, otherwise known as retinoic acid, is an exceptionally powerful skincare ingredient for youthful-looking skin. Highly potent and wildy efficacious, it is able to trigger cellular regeneration and collagen production to fight all visible signs of ageing. Retinoic acid is only available with a prescription, but vitamin A is available over the counter in the form of retinol skincare products.

    1. Retinol has similar effects to retinoic acid, however it must first be converted to retinaldehyde and then to retinoic acid to be used by the skin. Crafted with retinaldehyde,

    2. Crystal Retinal requires just one conversion to retinoic acid. This means that it is able to produce results comparable to retinoic acid up to 11 times faster than classic forms of retinol.[1] The advanced active is carefully encapsulated in a crystal structure that is broken down by the skin’s natural enzymes when topically applied. This ensures maximum stability and absorption while allowing the vitamin A active to be released gradually into the skin while you sleep for minimal irritation. 

      [1]  G. Seigenthaler et al., Biochemical Journal, 1990, 268, pp 371-378 

    3. Combined with hydrating hyaluronic acid and skin-soothing vitamin E, Crystal Retinal targets fine lines and wrinkles for smooth and visibly youthful skin. Unlike other forms of vitamin A, retinaldehyde boasts direct, powerful antibacterial properties. This allows it to target acne-causing bacteria; promoting a healthy, visibly clear complexion. 

    • How To Use
      1. After cleansing in the evening, massage a small amount of Crystal Retinal across the face, neck and décolletage. 

      2. Allow to absorb before applying your moisturiser. Crystal Retinal application should be phased in gradually, and only use in the evening.

      3.  Use twice a week for the first 2 weeks, every other night for the next 2 weeks, then every night. 

      4. Always wear sunscreen the following morning while using this product, and for 1 week after. Consult a doctor if breastfeeding or pregnant.

      5. Patch testing prior to use is advised. Refer to for an in-depth guide to patch testing.

      Encapsulated Retinaldehyde

      Proven to work up to 11 times faster than retinolretinaldehyde is a revolutionary new form of vitamin A that targets fine lines and wrinkles, pigmentation and uneven skin texture.

      ​Hyaluronic Acid

      With a unique ability to attract and retain more than 1,000 times its own weight in water, hyaluronic acid draws moisture from the surrounding atmosphere into the skin, leaving the complexion feeling both nourished and supple.

      ​Vitamin E 

      An oil-soluble antioxidant, vitamin E can quench free radicals on the skin while stabilising retinaldehyde for optimal power.


      As a natural humectant, glycerin traps water within the skin to leave it hydrated and comfortable.

      • The Science Behind

        Crystal Retinal is formulated with stabilised retinal, a powerful derivative of vitamin A with next-generation anti-ageing results. Unmatched in its age-defying power, retinal can deliver results comparable to clinical-grade vitamin A up to 11 times faster than classic forms of retinol.(1) 

        The ground-breaking overnight serum visibly minimises fine lines and wrinkles; firming and plumping the complexion to resurface skin texture and soften the face. Featuring hyaluronic acid, glycerin and vitamin E, it hydrates skin at every level to deliver a supple, even-toned, more youthful-looking complexion. More than that, it actively helps reduce blemish-causing bacteria to keep skin clear and balanced. In just 4 weeks, skin is noticeably younger, smoother and undeniably radiant.(2)

        1 G. Seigenthaler et al., Biochemical Journal, 1990, 268, pp 371-378
        2 Independent user trial carried out over 8 weeks using Crystal Retinal 6. Individual results may vary.