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Crystal Retinal 6
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Medik8 Crystal Retinal 6 30ml

%0 4.71 | 3296 reviews
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£69.00 (£2.30 per ml)

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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 4 out of 5 by from Really good ret! [This review was collected as part of a promotion.] I was being cautious and started at 3, but I’ve had no irritation at all and I’m about 9 weeks in and now using every night. I can see a slight different in texture but nothing outstanding yet but still early days!
Date published: 2026-03-12
Rated 4 out of 5 by from Very nice [This review was collected as part of a promotion.] Bought the lowest strength as I have well-managed eczema (not broke out at the moment). No irritation at all but not sure it's going to do much at this strength. Looking forward to my skin getting used to this and going up in strength! The cream is a lovely texture. Will say the vanilla smell is very nice but quite strong. Only thing is I find the pump doesn't work very well. Squeezing whilst using the pump works well though.
Date published: 2026-03-12
Rated 5 out of 5 by from Cream is best have had [This review was collected as part of a promotion.] Cream is best have had and works well. Intend to buy Crystal Retinal 10 next time for further improvement. Have sensitive skin and had no problems at all.
Date published: 2026-03-12
Rated 5 out of 5 by from Fantastic serum [This review was collected as part of a promotion.] I love this serum I have been using it for a while now and now up to 10 strength. I can feel my skin feels more radiant.
Date published: 2026-03-12
Rated 5 out of 5 by from Love this. Feel like this [This review was collected as part of a promotion.] Love this. Feel like this is probably working well and I could go up a strength. Haven’t had any purging.
Date published: 2026-03-11
Rated 5 out of 5 by from Excellent products [This review was collected as part of a promotion.] I have used several different products & they are excellent, the vit c serum is exceptional
Date published: 2026-03-11
Rated 5 out of 5 by from First time using retinol, this [This review was collected as part of a promotion.] First time using retinol, this has been great for my sensitive skin hasn’t broken me out or created any redness and irritation
Date published: 2026-03-09
Rated 5 out of 5 by from Perfect for my skin! [This review was collected as part of a promotion.] I have recently been using the Serum and I have noticed that my skin feels smooth and lighter! My forehead wrinkles are still here, I have seen an improvement. But i love this company and I have bought a whole range of products according to the quiz on the webaccount. Thank you Medik8 team! Happy customer here! ❤️
Date published: 2026-03-08
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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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