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Crystal Retinal 6
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Medik8 Crystal Retinal 6 30ml

%0 4.71 | 3676 reviews
Box

£69.00 (£2.30 per ml)

Free UK delivery

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This product is temporarily out of stock

If you like we can let you know when we have some more.

Product Description

Reveal visibly firmer, brighter-looking skin with just 1 tube of Crystal Retinal.

Medik8’s bestselling vitamin A night serum is formulated with next-generation retinaldehyde (retinal) which is clinically proven to act 11x faster than retinol* for a visibly brighter, smoother and firmer-looking complexion.

Unlike other retinal serums available, Crystal Retinal features Medik8’s unique patented stability system to ensure maximum retinal potency, while their industry-leading encapsulation technology delivers powerful yet gentle results with minimal irritation, even on sensitive skin types.

Loved and recommended by dermatologists and professionals all over the world, Crystal Retinal features a unique ladder of 5 progressive strengths (0.01%-0.2% retinal) so that you can continue to experience increased visible youth-renewing results. If you’re a vitamin A beginner, Medik8 recommends that most people start on Crystal Retinal 3 (0.03%), or Crystal Retinal 1 if you have very sensitive skin (0.01%). If you’re an experienced vitamin A user, start with Crystal Retinal 6 (0.06%) and gradually work your way up to Crystal Retinal 20 (0.2%). To use Crystal Retinal 20, you must have comfortably finished at least 2 tubes of Crystal Retinal 10 due to it containing a high percentage of retinal.

Working to reduce the appearance of stubborn fine lines and wrinkles and dark spots, Crystal Retinal is the ultimate age-defying serum for a healthier, more youthful-looking complexion.
*G. Siegenthaler et al., Retinol and retinal metabolism, Biochemical Journal, 1990, 268, pp 371-378

Key Benefits:
Fast Wrinkle Reducing Power
Clinically proven to visibly reduce wrinkles & dark spots by 20% 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
97% felt their skin had a more youthful appearance*
*Proven via independent clinical study on 1 tube of Crystal Retinal 6. Tested on 33 participants over 12 weeks.

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 on sensitive skin

Proven Results:
97% felt their skin had a more youthful appearance*
20% reduction in the appearance of wrinkles*
20% reduction in visible hyperpigmentation*
11% increase in skin firmness*
100% felt Crystal Retinal was gentle on their skin*
*Proven via independent clinical study on 1 tube of Crystal Retinal 6. Tested on 33 participants over 12 weeks.

Key Ingredients:
Retinaldehyde
Retinaldehyde (retinal for short) is a revolutionary form of vitamin A that is clinically proven to work 11x faster than traditional retinol* to address the appearance of fine lines and wrinkles, uneven skin texture, loss of firmness and hyperpigmentation without any irritation.
*G. Siegenthaler et al., Retinol and retinal metabolism, Biochemical Journal, 1990, 268, pp 371-378

Hyaluronic Acid
An incredibly hydrating ingredient, hyaluronic acid attracts and retains more than 1,000 times its own weight in water and draws moisture in the upper layers of the skin; leaving it looking visibly supple and deeply hydrated.

Vitamin E
Rich in antioxidants, vitamin E helps to protect the skin against ageing free radicals, while helping to stabilise retinal for maximum results.

Glycerin
A natural humectant that locks moisture into the skin; leaving it feeling comfortable and hydrated.

Good to Know:
CLINICALLY-PROVEN FORMULA
DERMATOLOGIST RECOMMENDED
NO ARTIFICIAL FRAGRANCE
NO SYNTHETIC COLOURS
PARABEN FREE
ALCOHOL FREE

Directions

Step 1
After cleansing in the evening, apply 2 pumps of Crystal Retinal to the face and neck. Allow to absorb then follow with a moisturiser. We recommend Advanced Night Restore which is specifically designed to be used after vitamin A.

Step 2
For new users of Crystal Retinal, phase application in gradually. Use twice a week for the first 2 weeks, every other night for the next 2 weeks, then every night. You should always use a sunscreen the next morning after using vitamin A.

How to Layer Crystal Retinal
PM: In your evening routine, first cleanse and apply your target serum. Follow with Crystal Retinal and finally, your moisturiser.

Ingredients

Simmondsia Chinensis (Jojoba) Seed Oil, Cyclopentasiloxane, Cyclohexasiloxane, Tetrahexyldecyl Ascorbate, Citrus Grandis (Grapefruit) Peel Oil, Tocopheryl Acetate, PPG-12/SMDI Copolymer, Limonene, Citral, Linalool, Geraniol.

This list of ingredients may be subject to change, please consult the packaging of the product purchased.

See more...

Rated 5 out of 5 by from My holy grail [This review was collected as part of a promotion.] I have tried a lot of other brands for retinol and retinal products but nothing compares to this. I have sensitive skin and this hasn't caused any issues. I started with the lowest strength and over the last 3yrs I have slowly built up. I gradually add it into my routine so my skin gets used to the newer strength. You can see the product works in my skin and my fine lines. I stopped using it for a while due to the fact this product is expensive but, where this product is concerned, you definitely get what you pay for in quality and results. It will continue to be in my routine
Date published: 2026-08-02
Rated 3 out of 5 by from I already returned it because [This review was collected as part of a promotion.] I already returned it because it broke me out badly.
Date published: 2026-08-02
Rated 5 out of 5 by from If I Could Only Choose One. . . [This review was collected as part of a promotion.] I mean. . . what can I say?! I LOVE, LOVE, LOVE this! I've been using Crystal Retinal for a while now + have gradually worked my way up through the strengths. My skin honestly looks the best it ever has. If I could only choose one skincare product, this would be it. It's made such a noticeable difference to the overall appearance of my skin, and I genuinely couldn't imagine my routine without it.
Date published: 2026-08-01
Rated 5 out of 5 by from Crystal retinal is excellent and [This review was collected as part of a promotion.] Crystal retinal is excellent and I have noticed a massive improvement in my skin over time, better texture and glow and fine lines minimised, I love it
Date published: 2026-08-01
Rated 5 out of 5 by from Amazing product [This review was collected as part of a promotion.] This truly is an amazing product and I have seen significant results since I started using this as part of my evening skincare routine. The quality of the retinal and the texture of my skin have made me really happy.
Date published: 2026-07-30
Rated 5 out of 5 by from Perfect [This review was collected as part of a promotion.] Use all the time , and wouldn’t be without this serum.
Date published: 2026-07-30
Rated 4 out of 5 by from Great [This review was collected as part of a promotion.] First time using Retinal. Started with retinal 1 as didn't know whether my skin will tolerate this as I have sensitive skin. Then moved on to Retinal 3. This is my first tube and almost finished. Very impressed, didn't break me out and my skin looks smoother and brighter. Already ordered another tube. Wish the price would be cheaper thats why gave it 4 stars
Date published: 2026-07-30
Rated 5 out of 5 by from Glow [This review was collected as part of a promotion.] Been using this product now for a while definitely notice an Improvement in my fine lines my skin is glowing in the morning love it
Date published: 2026-07-30
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I am on retinal 3 at the moment can I move up to 6 now 

Asked by: Thera
If you have used retinal 3 for a while and your skin is okay with it, then yes I would say you can try 6. 
Answered by: Rachel
Date published: 2024-09-04

Can I use this serum under eyes?

Asked by: Anonymous
I think it might be too potent for under eye 
Answered by: Anonymous
Date published: 2024-07-19
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