Medik8 UK · Crystal Retinal · Retinal Serum · C-Tetra Vitamin C · Liquid Peptides · Medical-Grade Skincare UK
MEDIK8 — BUY MEDIK8 ONLINE UK | OFFICIAL AUTHORISED STOCKIST
Vitamin C and SPF by day, vitamin A by night. Medik8's CSA approach is the simplest evidence-based routine in skincare — and the foundation of every product in the range.
Medik8 was founded in 2009 by Elliot Isaacs, a British formulator who set out to answer a question the industry had been avoiding: why do most people give up on the ingredients that actually work?
The answer, usually, is that they were sold the wrong strength. Retinoids are the most evidenced anti-ageing ingredient there is, and the most abandoned — because too many people start too high, react, and never go back. Vitamin C is the most established antioxidant in skincare, and the most poorly formulated — most serums sting, oxidise in the bottle and turn brown before they're finished.
Medik8 was built to fix both problems, and the range still reflects it.
CRYSTAL RETINAL — VITAMIN A THAT PEOPLE ACTUALLY STICK WITH
All vitamin A must convert to retinoic acid before the skin can use it. Retinol requires two conversion steps. Retinaldehyde requires one — which is why Crystal Retinal works up to 11 times faster than retinol, while remaining far better tolerated than prescription retinoic acid itself.
But the real innovation isn't the molecule. It's the ladder. Crystal Retinal comes in six progressive strengths, from 1 for genuinely sensitive skin through to 24 for experienced users, so you start where your skin is comfortable and climb over months. Nobody is asked to tolerate a strength they aren't ready for — which is precisely why people keep using it, and why it's now the bestselling retinal serum in the world.
C-TETRA — VITAMIN C WITHOUT THE COMPROMISE
Most vitamin C serums use L-ascorbic acid: effective, but acidic, unstable and prone to oxidising into something inactive within weeks of opening. Medik8 use tetrahexyldecyl ascorbate instead — an oil-soluble, non-acidic form that penetrates readily, doesn't sting and doesn't destabilise.
The result is a vitamin C you can use every morning, on sensitive skin, without the tingle that most people wrongly assume means it's working. Available from 7% for beginners through to 20% with phyto exosomes for established users.
CSA — THE ROUTINE UNDERNEATH EVERYTHING
Vitamin C and sunscreen in the morning. Vitamin A at night.
That's it. It sounds almost too simple for a brand built on formulation science, but it's the point: three actives with more evidence behind them than anything else in skincare, used consistently, will outperform a ten-step routine of things that sound impressive. Every Medik8 product is designed to fit around that framework rather than complicate it.
WHY WE STOCK IT
We stock three brands, and each does something the others don't.
Where Obagi is prescription-strength correction — for pigmentation and sun damage that needs medical intervention — Medik8 is what most people should be using every day, for years. It's the range we recommend for prevention, for maintenance, and for anyone who wants genuine clinical actives without needing a prescription to access them.
It's also the range we recommend most often to people who have tried actives before and given up. If retinol irritated you, if vitamin C stung, if you concluded your skin simply couldn't tolerate these things — it's far more likely you were started at the wrong strength than that your skin is the problem.
WHAT WE STOCK
The complete Medik8 range including Crystal Retinal in all six strengths, Crystal Retinal Ceramide Eye, C-Tetra, C-Tetra Luxe, C-Tetra Advanced and C-Tetra Cream, Liquid Peptides, Liquid Peptides Advanced MP, Advanced Night Restore, Press & Clear, Bakuchiol Peptides and Advanced Day Ultimate Protect SPF 50.
All genuine, UK-sourced product from authorised distributors. Never grey market. Never unverified.
NOT SURE WHERE TO START?
Medik8's strength ladders exist so you can be matched properly rather than guessing — but that only works if somebody does the matching. Take our routine builder, or book a skin consultation and we'll tell you exactly which strength to start on and when to climb.
WHEN YOU NEED PRESCRIPTION STRENGTH
Medik8 is not prescription skincare, and for most people it doesn't need to be. Where pigmentation, melasma or sun damage is established enough to need tretinoin or hydroquinone, that sits with our prescription Obagi range — assessed by our prescriber and dispensed to you personally. If you're unsure which you need, the skin assessment will tell you.
