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Medik8 C-Tetra Serum 30ml

With their tried-and-tested CSA philosophy a hard-working marriage between vitamin C with sunscreen by day, and vitamin A by night Medik8 seeks to create simple routines that result in healthy, beautiful skin for life. The goal is to uncloak the mystery surrounding anti-ageing skin care with results-driven products that dont compromise on ethics. Championing sustainability, cleaner oceans and less waste, Medik8 is a brand with heart one that began with a simple love for family. After creating an anti-redness product for his sister, Medik8s founder Elliot Isaacs went on to create the powerhouse that is Medik8 today. Boasting handy all-rounders like the C-Tetra serum, you need to introduce a batch of Medik8 to your bathroom cabinet, stat! This best-selling formula helps to restore radiance and fights premature signs of ageing with vitamins C and E a results-driven combo thats proven to work against sun and pollution-induced damage for more youthful, rejuvenated and nourished skin.


Two key antioxidants vitamins C and E make the C-Tetra your new Holy Grail serum. Perfect for everyday use with its light formula, C-Tetra sinks past the defensive lipid barrier and deep into skin, for extra protection against sun and pollution-induced damage.

This formula visibly stimulates the production of collagen and elastin while also brightening and balancing skin tone as it protects your skin from premature ageing. C-Tetra uses tetrahexyldecyl ascorbate, an uber-effective source of vitamin C that not only allows for deeper penetration, but results in less irritation important for sensitive skin types. Brightness is then boosted by red ginseng and maracuja oil, which is naturally rich in vitamin E. Vitamin E perfectly complements the vitamin C, delivering a nourishing dose of hydration to give a soft, glowy complexion. As luxurious as it is efficient, C-Tetra treats you to an uplifting scent of sweet orange, sans any artificial fragrances the perfect way to begin your morning.


After cleansing in the morning, massage 4 drops across the face, neck and daccolletage. Leave to absorb before applying moisturiser.

Please note: the visual and product name listed may differ to the packaging received due to product updates across the range. Rest assured, the formula and great results will remain the same.

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

Brand:
Medik8
Volume:
30ml

Frequently Bought Together

Medik8 C-Tetra Serum 30ml
This item
Medik8 C-Tetra Serum 30ml
£35.00
Medik8 C-Tetra Serum 30ml + Medik8 Crystal Retinal 3 Serum 30ml

Total Price: £80.00

Add both to basket
Medik8 C-Tetra Serum 30ml
This item
Medik8 C-Tetra Serum 30ml
£35.00
Add both to basket

Medik8 C-Tetra Serum 30ml

GBP 35.0

£35.00

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With their tried-and-tested CSA philosophy a hard-working marriage between vitamin C with sunscreen by day, and vitamin A by night Medik8 seeks to create simple routines that result in healthy, beautiful skin for life. The goal is to uncloak the mystery surrounding anti-ageing skin care with results-driven products that dont compromise on ethics. Championing sustainability, cleaner oceans and less waste, Medik8 is a brand with heart one that began with a simple love for family. After creating an anti-redness product for his sister, Medik8s founder Elliot Isaacs went on to create the powerhouse that is Medik8 today. Boasting handy all-rounders like the C-Tetra serum, you need to introduce a batch of Medik8 to your bathroom cabinet, stat! This best-selling formula helps to restore radiance and fights premature signs of ageing with vitamins C and E a results-driven combo thats proven to work against sun and pollution-induced damage for more youthful, rejuvenated and nourished skin.


Two key antioxidants vitamins C and E make the C-Tetra your new Holy Grail serum. Perfect for everyday use with its light formula, C-Tetra sinks past the defensive lipid barrier and deep into skin, for extra protection against sun and pollution-induced damage.

This formula visibly stimulates the production of collagen and elastin while also brightening and balancing skin tone as it protects your skin from premature ageing. C-Tetra uses tetrahexyldecyl ascorbate, an uber-effective source of vitamin C that not only allows for deeper penetration, but results in less irritation important for sensitive skin types. Brightness is then boosted by red ginseng and maracuja oil, which is naturally rich in vitamin E. Vitamin E perfectly complements the vitamin C, delivering a nourishing dose of hydration to give a soft, glowy complexion. As luxurious as it is efficient, C-Tetra treats you to an uplifting scent of sweet orange, sans any artificial fragrances the perfect way to begin your morning.


After cleansing in the morning, massage 4 drops across the face, neck and daccolletage. Leave to absorb before applying moisturiser.

Please note: the visual and product name listed may differ to the packaging received due to product updates across the range. Rest assured, the formula and great results will remain the same.

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

Brand:
Medik8
Volume:
30ml

Frequently Bought Together

Medik8 C-Tetra Serum 30ml
This item
Medik8 C-Tetra Serum 30ml
£35.00
Medik8 C-Tetra Serum 30ml + Medik8 Crystal Retinal 3 Serum 30ml

Total Price: £80.00

Add both to basket
Medik8 C-Tetra Serum 30ml
This item
Medik8 C-Tetra Serum 30ml
£35.00
Add both to basket

Customer Reviews

Overall Rating : 4.26 / 5 (35 Reviews)
  • 24 5 star reviews
  • 3 4 star reviews
  • 3 3 star reviews
  • 3 2 star reviews
  • 2 1 star reviews
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Top Customer Reviews

Thanks for sharing your thoughts! Please remember that results will vary from person to person. We're proud to say that all customer reviews are independent, authentic and do not represent the views of Cult Beauty or The Hut Group.

Won't repurchase

Not sure that this really did anything for me. I've since moved on to another brand and didn't finish this bottle.  A nice product, but didn't feel that it was really working for me sadly.

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What is this sorcery?

The texture, the consistency, the smell, the finish...everything is just right. I've managed to balance my hormonal skin so it was time to bring back in a Vit C and boy am i glad it was t his one. Super lightweight, feels like an oil but absorbs like a serum. I've been using for around a month i've noticed a difference is he overall tone/balance of my skin. I have some gnarly post blemish marks on my cheeks and i'm definitely seeing a slight fade/improvement. I don't have particularly sensitive skin (combo queen) but appreciate when products don't tingle/cause any sensation yet just work. A little goes a long way and i can't wait to see the results as i continue to use.

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My Favourite So Far...

I love the oil-like texture of this serum, it's lightweight and can be patted in easily after toner. A little goes a long way (the instructions recommend 6 drops) and it doesn't take long to absorb into the skin. My main pet-peeve with vitamin C is that some serums can leave a brown/ orangey stain on skin and clothing. I've found this constantly when using the Inkey List and Drunk Elephant Vitamin C serums, so I thought it was normal. Medik8's Vitamin C however does no such thing. There is no colour to it, which suggests to me that it's more fresh (tends to go orangey as it ages) and doesn't leave the collars on my clothing & bra straps with a grubby stain. I've been using for around a month now and am not even 1/4 of the way through the 30ml bottle. Looking forward to repurchasing!

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Love this!

I love the smell and it’s make a difference to my complexion. I’m not usually a fan of oils but this isn’t too heavy and soaks in really quickly. I will definitely buy again - my skin is glowing!

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Love it

I’m on my 3rd bottle now. It has a super nice texture and smell (subtle). It appears to be oily at first but it’s immediately transformed to a super soft smooth texture, leaving your skin smooth and shine-free. I’ve recommended it to friends with different skin types and even oily skins seem to absorb it and don’t show any shine after using. After a few uses, you can notice the glow on your face! Amazing product!

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A Winner!

Second purchase and this teams up so well with their Advanced Day Ultimate Protect. I’m going to stick with Medik8 as I’m so impressed with their products having also used Daily Radiance Vitamin C. Highly recommend it!

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Didn't work for me

I was previously using drunk elephant, but wanted something that would brighten my skin a bit more. Unfortunately, this broke me out and now I have more dark spots and it has dried my skin out . I spent money on a full bottle and am trying to stick it out. But I'm getting more breakouts of little spots which is depressing as my skin routine was really working before I started using this. I will go back to using Drunk elephants vit c serum.

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Medik8 c tetra

My holy grail, I have used this product for years and years. I’ve tried other vitamin c serums and nothing matches C-Tetra. I do not buy anything else now, my skin is so dewy and I am 50 years old, I suggest everyone buys this. You will not be disappointed.

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Gentle but not life changing

I do like the consistency of this, it’s like an oil serum hybrid that’s very lightweight and sinks into your skin. It had a slight orange smell which I do enjoy since it’s not too potent and they didn’t overdo it with 200 different essential oils lol. However, I can’t tell if it’s doing anything because my skin definitely is smoother and brighter but I’m not sure if it’s the serum or the Ren toner I’m currently using. Either way, this product isn’t too bad but for the amount you get, the price and how fast you run through it I probably wouldn’t purchase it. I got this in a goody bag and that’s the only reason I got to try it. It is my first vitamin C which I’ll probably finish in a week and I have the YTTP Vitamin C to try once I’m done with this so I may have to update my review.

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Life-changing

I’ve used stable vitamin c products before which don’t irritate, so the brightness was great but expected. However, what did impress me is that after less than a week’s use my skin is bouncier and firmer. Just for context - I have lupus and I have the butterfly rash and other rashes across my face which damage my skin, affect collagen production and also impact my confidence. But to have a vitamin c product that isn’t harsh on the most sensitive of sensitive skin, pack it with other vitamins too and leave it bright, firm and bouncy is impressive and has given me a confidence boost.

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