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Unlock the simple, clinically proven approach to youthful, glowing skin - both instantly and over time. It’s as easy as using vitamin C plus sunscreen in the morning and vitamin A (also known as retinol/retinal) at night. We call this; the CSA PhilosophyⓇ.

Boost your skin's radiance each morning with C-Tetra Luxe and shield against sun damage with Advanced Day Ultimate Protect SPF 50+ PA+++. At night, experience ultimate age-defying results with Crystal Retinal 24. This CSA set offers a clinically proven approach to achieving youthful, glowing skin—both instantly and over time.

*Proven via independent study on a Medik8 CSA regime, on 30 participants over 12 months.

Contains a full size Crystal Retinal 24, a travel size C-Tetra Luxe and an Advanced Day Ultimate Protect deluxe sample. Save 23%. Available while stocks last.

Crystal Retinal CSA Set - Expert

Name: Crystal Retinal CSA Set - Expert
Brand: Medik8
Price: 103.00 GBP
Availability: InStock

Features Crystal Retinal 24, for expert vitamin A users. Save 23%. Full Details

Products in this bundle

Product variants

Crystal Retinal 24 - Expert

Award-winning Age-Defying Vitamin A Night Serum
C-Tetra® Luxe (Travel Size) - 8ml

Lipid 14% Vitamin C Enhanced Radiance Serum

Crystal Retinal CSA Set - Expert

KEY BENEFITS

CSA Philosophy: Unlock the simple, clinically proven approach to youthful, glowing skin - both instantly and over time.

Clinically proven to improve all signs of ageing by 60%*
CSA addresses 90% of anti-ageing skincare needs*
96% agree their skin looks younger**
12 months of a CSA skincare regime boosts skin confidence by 40%***
*Based on average change in key indicators of skin ageing, in a clinical study on 63 participants using a CSA skincare regime over 12 months / **Proven via independent study on a Medik8 CSA regime, on 30 participants over 12 months / ***Based on change in perception of skin confidence out of 10, over time

PROVEN RESULTS

Before

HOW TO USE

Step 1

After cleansing in the morning, massage 4 drops or a liberal amount of vitamin C serum or cream across the face, neck and décolletage.

Step 2

Leave vitamin C to absorb before applying sunscreen.

Step 3

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.

LOVED & RECOMMENDED

When it comes to recommending a retinoid, my unwavering choice is Crystal Retinal. This exceptional product has become my top recommendation for both patients and followers, thanks to its remarkable effectiveness and pioneering approach to skincare.

Dr Ewoma Ukeleghe

Medical & Cosmetics Doctor

THE SCIENCE BEHIND THE FORMULA

A true breakthrough in vitamin A skincare

Daniel Isaacs Chief Product Officer

When it comes to vitamin A; the more stable the molecule, the more effective it can be on the skin. Crystal Retinal offers a level of retinal stability that can only be found at Medik8.

Our innovative stability system features our renowned crystal encapsulation technology, a patented carrot seed oil complex, and airless packaging. All this comes together to protect the retinal molecule for unmatched potency, long-lasting effectiveness and proven skin comfort.

Unlike many retinals, which can cause flaking and irritation, Crystal Retinal has been expertly formulated in our in-house laboratory with a unique combination of the highest quality ingredients and patented technologies so it's gentle yet very powerful.

FAQS

How often should I use Medik8 Crystal Retinal?

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If you’re new to Crystal Retinal, it’s important that you follow our specific usage guidance to gradually phase in application. 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.
Is 0.1 retinal effective?

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Crystal Retinal 10 contains 0.1% retinaldehyde (retinal) which is a very effective strength for delivering visible age-defying results. We recommend Crystal Retinal 10 for advanced vitamin A users, looking to build on their visible results after using Crystal Retinal 6 (0.06% retinaldehyde).
How long does Crystal Retinal take to work?

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Crystal Retinal is clinically proven to deliver visible improvement on wrinkles as well as skin smoothness and brightness in as little as 7 days.*

<sup>*Proven via independent clinical study on the Crystal Retinal ladder tested on 30 participants over 24 weeks.</sup>
What is the difference between Crystal Retinal 10 and 20?

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Crystal Retinal 10 contains 0.1% retinaldehyde, while Crystal Retinal 20 contains twice that concentration at 0.2%. Crystal Retinal 10 is recommended for advanced vitamin A users (those who have used at least 1 tube of Crystal Retinal 6). Crystal Retinal 20 is recommended for experienced vitamin A users (who have used at least 1 tube of Crystal Retinal 10).
What percentage of retinal is in Crystal Retinal 20?

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Crystal Retinal 20 contains 0.2% retinaldehyde. We therefore recommend Crystal Retinal 20 for experienced vitamin A users (those who have used at least 1 tube of Crystal Retinal 10).
Do I need to phase Crystal Retinal into my routine?

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Yes. We always recommend phasing Crystal Retinal into your existing skincare routine; using it twice a week for two weeks, then every other night for two weeks, then every night after that. You do not have to phase in when moving up a strength within the Crystal Retinal ladder (e.g. when moving from Crystal Retinal 3 to Crystal Retinal 6).
Can I use Crystal Retinal if I have sensitive skin?

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Absolutely, with our unique ladder of progressive strengths which serves all skin types. Crystal Retinal 1 (0.01% retinaldehyde) is specifically formulated as the appropriate strength for those with sensitive skin who still want visible age-defying results.
Why can't I use Crystal Retinal during the day and is it safe when I'm going out in the sun?

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Crystal Retinal is completely safe to use if you're going to be exposed to sunlight, as long as you are applying a high protection sunscreen daily. Vitamin A is actually great for use during the summer months as it helps to counteract the visible effects of sun damage but, like all vitamin A formulas, it can make your skin more sensitive. It is also not a photostable ingredient which means it can lose its power and degrade when exposed to direct sunlight. This is why we strongly recommend using Crystal Retinal at night, and then applying a liberal amount of high protection sunscreen the following day. If you are in direct sunlight, we always recommend reapplying your sunscreen every 2 hours.

If you are looking for a vitamin A formula that can be used both morning and evening, try r-Retinoate Day & Night. Formulated with retinyl retinoate, it remains stable when exposed to UV light, meaning it can be used in both your daytime and nighttime regimens.
Can I still use Crystal Retinal when I’m going out in the sun?

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Absolutely. Crystal Retinal is completely safe to use if you’re going to be exposed to sunlight, as long as you are applying a high protection sunscreen daily. Vitamin A is actually great for use during the summer months as it helps to counteract the visible effects of sun damage but, like all vitamin A formulas, it can make your skin more sensitive. That’s why we strongly recommend using your vitamin A serum at night, and then applying ¼ teaspoon amount of high protection sunscreen like Advanced Day Ultimate Protect the following day. If you are in direct sunlight, we always recommend reapplying your sunscreen every 2 hours.

Crystal Retinal CSA Set - Expert

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Crystal Retinal CSA Set - Expert

Features Crystal Retinal 24, for expert vitamin A users. Save 23%. Full Details

Sorry, this product is currently out of stock

KEY BENEFITS

CSA Philosophy: Unlock the simple, clinically proven approach to youthful, glowing skin - both instantly and over time.

PROVEN RESULTS

HOW TO USE

LOVED & RECOMMENDED

THE SCIENCE BEHIND THE FORMULA

FAQS

How often should I use Medik8 Crystal Retinal?

Is 0.1 retinal effective?

How long does Crystal Retinal take to work?

What is the difference between Crystal Retinal 10 and 20?

What percentage of retinal is in Crystal Retinal 20?

Do I need to phase Crystal Retinal into my routine?

Can I use Crystal Retinal if I have sensitive skin?

Why can't I use Crystal Retinal during the day and is it safe when I'm going out in the sun?

Can I still use Crystal Retinal when I’m going out in the sun?

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