SKU: 50692385924

Medik8 - Crystal Retinal 6 Night Serum 30ml

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Description

Medik8 - Crystal Retinal 6 Night Serum 30mlDESCRIPTION Rediscover youthful skin with Crystal Retinal 6, Medik8s latest innovation in vitamin A. Formulated with 0. 06% 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. The ground breaking overnight serum visibly minimises fine lines and wrinkles;

DESCRIPTION

Rediscover youthful skin with Crystal Retinal 6™, Medik8’s latest innovation in vitamin A. Formulated with 0.06% 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. 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

Crystal Retinal 6 is perfect for those who are new to vitamin A or who are looking to upgrade their retinol results.

2 Independent user trial carried out over 8 weeks using Crystal Retinal 6. Individual results may vary.

KEY BENEFITS

Supercharge the results of your night-time regime. Reducing the appearance of fine lines in just 4 weeks,3 Crystal Retinal 6 visibly plumps and refines the skin for a more youthful looking 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.

3 Independent user trial carried out over 8 weeks using Crystal Retinal 6. Individual results may vary.

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 helps reduce the 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. 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, Crystal Retinal 6 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. 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. Combined with hydrating hyaluronic acid and skin-soothing vitamin E, Crystal Retinal 6 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.

3 Independent user trial carried out over 8 weeks using Crystal Retinal 6. Individual results may vary.

Patented Stability Matters

The more stable the molecule, the more effective it can be on the skin. Crystal Retinal offers a level of retinal stability that is only found at Medik8: our innovative stability system features our renowned crystal encapsulation and a patent-pending formula complex. The dual-layered stability system comes together to protect the retinal molecule for unmatched potency and long-lasting effectiveness.

Ladder Up

Always peak, never plateau. Ladder up your results with 5 available strengths: 1, 3, 6, 10 and 20. Most customers start on Crystal Retinal 3 (for skincare beginners) or 6 (for experienced skincare users), then over time move up to 10. 

Top tip! Crystal Retinal is also the perfect vitamin A for those wanting to target the appearance of blemishes and congestion due to retinal’s unique antibacterial action on the skin.

Retinal Results

The leader of retinal vitamin A skincare innovation, the powers of Crystal Retinal are loved by customers and skin professionals alike. The ground-breaking formula works fast to deliver the clinically proven benefits that sets Crystal Retinal above the rest.

THE SCIENCE BEHIND

“After years of research and experimentation, we cracked the retinal code in 2018 with a unique stabilisation discovery. Our reinforced stability system involves two formulation techniques. First, we protected the powerful yet fragile molecule with a crystal encapsulation that works to both blanket the retinal and time-release it onto our skin gradually throughout the night to minimise any potential for irritation. We then fortified this with a patent-pending stabilisation formula complex, which is unique to Medik8, to ensure the retinal is stabilised throughout its whole life cycle - from raw material, all the way onto our skin. This means that your Crystal Retinal remains powerful from the first application, to the very last".

Daniel Isaacs, Director of Research.

HOW TO USE

After cleansing in the evening, massage a small amount of Crystal Retinal 6 across the face, neck and and décolletage. Allow to absorb before applying your moisturiser.

Crystal Retinal 6 application should be phased in gradually. Use twice a week for the first 2 weeks, every other night for the next 2 weeks, then every night. Always wear sunscreen the following morning while using this product, and for 1 week after. Consult a doctor if breastfeeding or pregnant.

Shipping Notes
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Exchange/Return Notes
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SKU: 50692385924

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Love them!!! I stay so hot and these really wick the moisture away!
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Reviewed in the United States on February 26, 2026
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Mia
Cuba, US
★★★★★ 2
Not for me
Returned. Too flimsy, did not like the strups shape, was not flattering or supportive in any way, white one is completely see through
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Reviewed in the United States on March 17, 2026
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Siobhan Smith
Charlottesville, US
★★★★★ 5
Super soft and comfortable!
I haven't bought new underwear in forever. I used to wear thongs, but now find them incredibly uncomfortable. The last few times I've tried to buy new underwear, the sizing was either way off (I'm a medium, but gave up after having to return them for a large and then extra large) or the quality was horrible (two brands stretch waaaay out and they can fall down while wearing them (I have larger ass-ets, so they shouldn't start to slide down during use). I tried these after buying some bamboo pyjamas and I love them! They are incredibly soft, comfortable, and stretchy. I can use them all day, and they work well, whether I'm lounging on the couch or wearing them under my spandex shorts at the gym, they don't ride up or slide down. They are both comfortable and look sexy, while providing support in all the right places. I haven't had them too long, so I can't speak on the durability, but they appear to be of good quality and I plan to order more, this time without the band.
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Reviewed in the United States on November 13, 2025
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Mariel
Los Angeles, US
★★★★★ 5
Well made, light fabric. Waist doesn't roll.
These bamboo underwear really do keep you cool. They fit true to size, and wear easily. the wide elastic waist band doesn't roll on me. They are comfortable to wear, washed and dried easily. The material has some stretch to it, but not a lot. Well made, no stray strings. Perfect fit for me. Just what I was looking for.
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Reviewed in the United States on May 17, 2026
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Finngirl
Draper, US
★★★★★ 5
Good quality, smooth feel
I got these briefs so recently that have washed just one pair so far. First off, these are very comfortable, the material is soft & bordering silky, good quality sewing. Wash well and minimal if any shrinkage. They do come a bit wrinkled from the dryer but hey, these are underwear and will go on smoothly. If it were a t-shirt, I would look sloppy. I feel the sizing is accurate. No rolling and these don't announce themselves under clothing. Planning on getting more of these boxers and replacing my old panties.
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