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Crystal Retinal 6

Medik8 Crystal Retinal 6 30ml

%0 4.71 | 3933 reviews
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£69.00 (£2.30 per ml)

Free UK delivery

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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.

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Rated 5 out of 5 by from This product is absolutely amazing! [This review was collected as part of a promotion.] Everyone keeps asking what I’m using on my skin. This product is absolutely amazing!
Date published: 2026-10-28
Rated 5 out of 5 by from Retinal 20 [This review was collected as part of a promotion.] I have been using medik8 for a while now and have been building up to level 20. I absolutely love this retinal cream and have seen benefits already. It comes highly recommend by professionals. So believe this is the best of the best to use on my skin. I’ve noticed my skin looks fresher and smoother, no congestion and wrinkles look fainter and my over all complexion looks amazing. This selection of retinal is good for me at the moment, but I will be going onto the next level once I’ve finished with this one. A very happy customer 😊
Date published: 2026-10-28
Rated 5 out of 5 by from I’ve been using Crystal Retinal [This review was collected as part of a promotion.] I’ve been using Crystal Retinal for about a year and can definitely see an improvement to my skin, particularly to a few deep lines that were on my forehead. It’s easy to apply and has never caused any irritation or sensitivity.
Date published: 2026-10-28
Rated 5 out of 5 by from Gentle and effective [This review was collected as part of a promotion.] I used this after reading so many good reviews. My skin is very sensitive and I was worried I will have a reaction but to my suprise it was gentle with immaculate results
Date published: 2026-10-28
Rated 5 out of 5 by from Great retinal [This review was collected as part of a promotion.] My 2nd tube of level 3. Looking forward to moving up to level 6
Date published: 2026-10-28
Rated 5 out of 5 by from Crystal Retinal [This review was collected as part of a promotion.] Fantastic product that makes a real difference to your skin. Great system that enable you to increase the intensity of the product as your skin adjusts and no redness or dryness from it
Date published: 2026-10-28
Rated 4 out of 5 by from Medik8 Advanced Amazing product and will buy it again and again. Is an incredible SPF50 block and also not too greasy under my makeup.
Date published: 2026-10-28
Rated 5 out of 5 by from Worked up to 20 strength, [This review was collected as part of a promotion.] Worked up to 20 strength, and it’s been worth it, a marathon not a sprint where Retinal is concerned. Patience is key !
Date published: 2026-10-28
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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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