I Thought My Skincare Routine Was Perfect—This Vitamin C Serum Made Me Reconsider Everything
The latest release in the C-Tetra range, the C-Tetra Advanced promises a 20% vitamin C potency in a much lighter formula. The silky, quick-absorbing texture is ideal for those who find the original C-Tetra or C-Tetra Luxe too rich in texture, but still want a high-performing formula.
I’ve only had this in rotation for a few weeks since its launch, but the results are already so impressive. It's unlocked a serious glow in my skin, helping to fade post-acne marks and sun damage. It’s light enough to layer under SPF and moisturiser, doesn’t pill and gives a noticeable radiance even just after a week. And even on my reactive skin, I haven’t experienced any sensitivity so far. It may be down to the fact that Medik8 has included plant exosomes, which work in tandem to support the skin barrier and minimise skin irritation. As someone with oily skin, I appreciate the silky texture that doesn't disturb my makeup or leave me looking shiny come 1pm.
- Highest strength of vitamin C at 20%
- Brightens pigmentation and scarring, plumps wrinkles and smoothes skin texture
- Defends against environmental damage
- Absorbs quickly and layers beautifully under SPF and makeup
- Ideal for all skin types, but particularly combination and oily skin
- If you're very sensitive to vitamin C, it may be too strong
- The most expensive formula out of the three versions
2. Medik8 C-Tetra Luxe
3. Medik8 C-Tetra
The Verdict
Medik8’s C-Tetra line offers one of the most accessible, stable and elegant vitamin C ranges on the market. Whether you're a beginner or a glow obsessive, there’s a serum in this trio that will suit your skin. I can see why Medik8's formulas are so trusted amongst experts. The formulas are rigorously tested and optimised to deliver results, so you know if you invest in one of these three serums, you're going to see visible benefits.Having tested the new C-Tetra Advanced for the past couple of weeks, I can visibly see how much clearer and glowing my skin is. In fact, it's clinically proven to brighten skin and improve the look of wrinkles in just a week. I'd recommend this one if you want a potent vitamin C serum, or prefer a gel-serum texture that sinks in quickly.The C-Tetra Luxe and original C-Tetra are also brilliant. Having tested them both before, it really comes down to your preferences on texture and formula. The former has a 14% vitamin C concentration and comes in a richer, oil-serum consistency. I'd recommend this one for mature skin or those with dry skin types that crave a more nourishing formula on their skin.
As for the C-Tetra, the 7% vitamin C formula is ideal for those who are new to using vitamin C. The texture is more akin to a traditional serum that sinks in quickly, so it will suit most skin types.
Shop More Medik8:Why Trust Us
At Who What Wear UK, we know that beauty isn’t one-size-fits-all. Our editors have tested thousands of products, including skincare, makeup, hair and nails, over the years and work closely with trusted experts—dermatologists, make-up artists and leading industry insiders—to ensure every guide is well-researched, inclusive and relevant to you.
We focus on formulas that deliver, whether they’re affordable favourites or luxury investments. Our product selection is based on tangible results, ingredient know-how and what we’d truly recommend to a friend.
whowhatwear
