Medik8 C-Tetra Serum Review – Beautiful With Brains


NOTE: This serum is now known as Medik-8 C-Tetra and is available in a barely completely different bottle. However the method inside is similar, so every thing nonetheless applies.

Assessment up to date on 29/04/2024.

What’s the very best Vitamin C spinoff on the market?

Yeah, yeah, ideally we must always all use pure vitamin C (L-Ascorbic Acid). However that’s irritating as hell. Unstable AF. Goes dangerous earlier than you attain half the bottle and stings your pores and skin like loopy.

Give me a spinoff, pronto!

However, which one? There are greater than a dozen today, all promising the identical advantages as pure vitamin C with out the uncomfortable side effects. How have you learnt which one actually delivers?

Personally, I’m a fan of Tetrahexyldecyl Ascorbate, the spinoff utilized in Medik8 C-Tetra Serum. Right here’s why:

What’s In Medik8 C-Tetra Serum?


Let’s be sincere: Tetrahexyldecyl Ascorbate (TA) isn’t as highly effective as L-Ascorbic Acid. But it surely does two issues means higher than it:

  1. Stability: It doesn’t oxidise (i.e. go dangerous) as rapidly when uncovered to mild and air (learn: you may truly end the bottle!).
  2. Penetration: Whereas L-Ascorbic Acid solely penetrates the dermis (uppermost layers of your pores and skin), TA penetrates each the dermis and the dermis (the deeper layer under it).

TA is so good at penetrating pores and skin as a result of it’s one of many few types of vitamin C that’s oil-soluble. And that immediately catapults it to the highest of the vitamin-C-derivates-to-try listing.

However, what the heck does it do as soon as it penetrates pores and skin? Research say it:

  1. Brightens the complexion
  2. Fights the free radicals that trigger wrinkles
  3. Boost collagen production

The catch? These research are performed through the use of both excessive concentrations of TA (20%>) or by combining decrease doses (8%>) with L-Ascorbic Acid.

Medik8 C-Tetra ONLY makes use of 7% Tetrahexyldecyl Ascorbate.

Don’t get me incorrect. I’m not saying this focus is simply too low to work (I did see an enchancment, as I’ll share in a while on this assessment).

However at this focus, that is extra of a preventative serum for ladies of their late 20s/early 30s. If you wish to fade darkish spots or cut back wrinkles, you’re nonetheless higher off with L-Ascorbic Acid.

Another factor: vitamin C works better when used together with vitamin E and ferulic acid. This serum solely has vitamin E. Not a biggie. It’ll nonetheless do its job nicely. I simply needed to say it for many who are searching for all 3 antioxidants of their serum.

Associated: Why You Should Add Vitamin C Into Your Skincare Routine

medik8 ce tetra vitamin c antioxidant serum


I do know what you’re pondering: “I’ve oily pores and skin so something with oil is out of the query.”

Usually, you’d be proper. But jojoba oil is one of the exceptions to the rule. Why?

Out of all of the oils, jojoba oil resembles sebum (your pores and skin’s pure moisturiser) extra intently. This implies it’s light-weight sufficient to sink rapidly into your pores and skin and never worsen pimples.

Plus – and that is excellent news for ALL pores and skin sorts – jojoba oil is wealthy in fatty acids that moisturise pores and skin and increase its moisture content. 

Translation: it moisturises pores and skin with out leaving a greasy, pimply mess behind.

Enjoyable reality: jojoba is pronounced “ho-ho-ba”.

Associated: What Are The Best Facial Oils For Oily Skin?


I’ll be transient. Grapefruit peel oil is right here solely to make the serum scent citrusy (as a result of how else do you count on vitamin C to scent like?!).

Downside is, its aromatic elements might irritate delicate pores and skin. There’s solely a drop of it right here, although, so it’s unlikely to be problematic for every other pores and skin sort.

I’ve been utilizing it for weeks and I didn’t expertise any irritations. Though I nonetheless desire my skincare fragrance-free, I’ve to confess I like how this serum smells. 🙂

Associated: Is Fragrance In Skincare As Bad As Paula Begoun Says?

Struggling to place collectively a skincare routine that minimises wrinkles, prevents untimely growing older, and provides your complexion a youthful glow? Obtain your FREE “Finest Anti-Ageing Skincare Routine” to get began (it options product suggestions + proper utility order):

The Relaxation Of The Components & Substances

NOTE: The colors point out the effectiveness of an ingredient. It’s ILLEGAL to place poisonous and dangerous substances in skincare merchandise.

  • Inexperienced: It’s efficient, confirmed to work, and helps the product do the absolute best job in your pores and skin.
  • Yellow: There’s not a lot proof it really works (at the very least, but).
  • Purple: What is that this doing right here?!
  • Cyclopentasiloxane: A unstable silicone that creates a velvety texture that glides easily on the pores and skin – after which evaporates into skinny air.
  • Cyclohexasiloxane: One other silicones that creates delicate, easy texture that don’t really feel greasy or sticky. It evaporates rapidly after utility.
  • Tocopheryl Acetate: A type of Vitamin E that fights free radicals and helps Vitamin C last more.
  • PPG-12/SMDI Copolymer: It has fixative properties that hold energetic substances suspended and helps make pores and skin softer and smoother.
  • Limonene: A aromatic element of citrus fruits, it makes the product scent good. But it surely have to be listed individually on the label as a result of it’s a standard allergen.
  • Citral: One other element of grapefruit oil that smells like lemon. It too have to be listed individually on the label as a result of it’s a standard allergen.
  • Linalool: It has a spicy floral scent that makes the serum good. But it surely’s one other frequent allergen.
  • Geraniol: One other aromatic ingredient that smells good, however can irritate delicate pores and skin.


Light-weight texture that sinks into the pores and skin actually rapidly. I swear you’d by no means say the bottom is an oil!


Technically, it’s fragrance-free. Medik8 didn’t add any separate perfume to it. Perfume can irritate pores and skin, so it’s all the time good to go away it out. However then, you might have a product that does an incredible job at stopping wrinkles, however you don’t wish to use it cos it smells like crap.

The workaround? Medik8 added grapefruit oil, an important oil that provides the serum a subtly summery citrus scent. However, the aromatic elements that make this oil scent wonderful also can irritate delicate pores and skin.

How To Use It

I like to make use of Vitamin C within the morning beneath sunscreen to maximise solar safety. However you can too use it at night time earlier than moisturiser. The nearer to scrub pores and skin you apply it, the simpler it penetrates pores and skin and the higher it really works.


The brand new model is available in a darkish bottle with a dropper applicator for ease of use. Plus, it appears good in your vainness too.

Efficiency & Private Opinion

Inside every week of utilizing Medik8 C-Tetra Serum, I observed my pores and skin turning into brighter. My pores and skin has a stunning glow that makes it look wholesome.

I can’t see that I’ve seen any discount in high-quality traces, however then this serum is preventative. You employ it to stop wrinkles from creeping up in your face, not a lot to scale back these which are already there.

And the science there’s stable. Nutritional vitamins C&E can destroy free radicals earlier than they depart wrinkles in your face. So I’ve no complaints right here. I do know that my pores and skin is nicely protected all day lengthy.

How Does Medik8 C-Tetra Serum Examine To The Different Vitamin C Merchandise From Medik8?

Medik8 C-Tetra Serum isn’t the one Vitamin C product Medik8 makes. Right here’s a fast information to let you already know if that is the best choice for you or in case you’d be higher off with one among its siblings:

  • Medik8 Day by day Radiance Vitamin C™ (£59.00): A light-weight cream with Tetrahexyldecyl Ascorbate to moisturise, brighten, and battle wrinkles on the identical time. It’s finest for mixture pores and skin. Obtainable at Cult Beauty, Look Fantastic, Medik8, Sephora, and SpaceNK
  • Medik8 Pure C15™ (£49.00): That is my fave serum as a result of it comprises 15% L-Ascorbic Acid (the pure type of Vitamin C – and the best) and Vitamin E to stop wrinkles and brighten the complexion. It’s the best serum, however it may irritate delicate pores and skin and goes dangerous rapidly. Obtainable at Medik8.
  • Medik8 R-Retinoate® Day & Evening (£149.00): It has a retinoid ester and Tetrahexyldecyl Ascorbate (Vitamin C spinoff) to stop and deal with wrinkles. It’s a great choice for individuals with delicate pores and skin that may’t tolerate retinol and/or L-Ascorbic Acid (the pure type of Vitamin C). Obtainable at Medik8, Sephora, and SpaceNK
  • Medik8 Tremendous C Ferulic™ (£69.00): It has 30% 3-O-Ethyl Ascorbic Acid, a spinoff of Vitamin C. I haven’t seen any unbiased proof it really works higher than L-Ascorbic Acid, the pure type of Vitamin C. However in case you’re curious to strive it, it may assist stop wrinkles. Obtainable at Medik8, Sephora, and SpaceNK
  • Medik8 C-Tetra Cream (£50.00): A hydrating cream with 7% Tetrahexyldecyl Ascorbate, Vitamin E, and hyaluronic acid. It’s finest for mixture pores and skin. Obtainable at Look Fantastic, Medik8, and Sephora
  • Medik8 C-Tetra Eye (£24.00): It’s the identical factor as Medik8 C-Tetra Serum, so save your self some cash and apply that on the attention space too.
  • Medik8 C-Tetra Luxe (£59.00): It’s just like Medik8 C-Tetra, but it surely has twice the quantity of Vitamin C and an oilier base. When you’ve got dry pores and skin, that is simpler and extra moisturising for you. Obtainable at Medik8, Sephora, and SpaceNK

What I Like About Medik8 C-Tetra Serum

  • Helps stop wrinkles
  • Helps brighten pores and skin
  • Light-weight, fast-absorbing texture
  • Doesn’t go dangerous as quick as L-Ascorbic Acid
  • Sensible packaging

What I DON’T Like About Medik8 C-Tetra Serum

  • Perfume might irritate delicate pores and skin
  • Not as efficient as 15% L-Ascorbic Acid, Vitamin E and Ferulic Acid

Who Ought to Use This?

Anybody who desires to stop untimely growing older and might’t use L-Ascorbic Acid as a result of it irritates their pores and skin.

medik8 ce tetra serum review

Does Medik8 C-Tetra Serum Stay Up To Its Claims?

Utilising the antioxidant energy of vitamin C and E, the hydrating serum brightens and smooths the complexion, whereas preventing free radicals to scale back seen indicators of ageing. True.
The method sinks into pores and skin rapidly, forsaking a delicate and glowing complexion. True.

Worth & Availability

£39.00 at Cult Beauty, Look Fantastic, Medik8, Sephora, and SpaceNK

The Verdict: Ought to You Purchase It?

Should you’re searching for a delicate Vitamin C serum that doesn’t go dangerous inside a number of weeks, this can be a good choice to think about.

Dupes & Alternate options

  • Paula’s Selection Resist Tremendous Antioxidant Serum ($43.00): Like all Paula’s Selection merchandise, this serum is loaded with antioxidants, together with two forms of Vitamin C (Tetrahexyldecyl Ascorbate + Magnesium Ascorbyl Phosphate) and the 2 pals that supercharge its anti-aging properties, vitamin E and  ferulic acid. When you’ve got delicate pores and skin, this is likely one of the finest Vitamin C serums available on the market in your pores and skin sort. Obtainable at Dermstore and Paula’s Choice.
  • Peter Thomas Roth Potent C Energy Serum ($105.00): I do know that is costly. But it surely’s value it. The serum makes use of 20% Tetrahexyldecyl Ascorbate + 3% vitamin E + 2% ferulic acid that will help you decelerate growing older and stop wrinkles. It has one of many highest concentrations of those actives you’ll discover in skincare merchandise. Obtainable at Blue MercuryNordstrom, and Ulta

Simmondsia Chinensis (Jojoba) Seed Oil, Cyclopentasiloxane, Cyclohexasiloxane, Tetrahexyldecyl Ascorbate, Citrus Grandis (Grapefruit) Peel Oil, Tocopheryl Acetate, PPG-12/SMDI Copolymer, Limonene, Citral, Linalool, Geraniol.

Source link


Please enter your comment!
Please enter your name here