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Medik8 C-Tetra® 30ml

Medik8 C-Tetra® 30ml

%0 4.73 | 833 reviews
Box

£42.00 (£1.40 per ML)

In stock

If you like we can let you know when we have some more.

Product Description

Restore the appearance of skin radiance in just 7 days* with Medik8’s cult favourite C-Tetra serum.

Expertly formulated by their skincare experts with a stabilised form of vitamin C (tetrahexyldecyl ascorbate ), this lightweight serum reduces the appearance of fine lines and wrinkles and visibly brightens uneven skin tone - all while remaining gentle on sensitive skin.

The addition of antioxidant-rich vitamin E protects the skin against the damaging and ageing effects of free radicals for a more healthy, youthful-looking complexion overall. The perfect daily serum for those who are new to vitamin C, or have sensitive skin.
*Proven via independent consumer study conducted over 4 weeks on 52 participants with sensitive skin.

Key Benefits:
Increased Skin Youthfulness
Proven to smooth the appearance of fine lines and wrinkles and visibly boost skin's radiance in 7 days*
*Proven via independent consumer study conducted over 4 weeks on 52 participants with sensitive skin.

Brighter, More Even Complexion
Proven to visibly brighten the skin in 7 days* and reduce the appearance of wrinkles & dark spots in 4 weeks*
*Proven via independent consumer study conducted over 4 weeks on 52 participants with sensitive skin.

Gentle, Lightweight Nourishment
The jojoba seed oil-based formula delivers non-greasy yet effective nourishment for visibly comforted and softer skin.
87% of sensitive skins agree this is the most gentle vitamin C serum they have ever used*
96% of sensitive skins agreed C-Tetra was gentle on the skin*
*Proven via independent consumer study conducted over 4 weeks on 52 participants with sensitive skin.

Proven Results:
7 days to restored skin radiance*
7 days to visibly brighter
96% of sensitive skins agreed C-Tetra was gentle on the skin*
4 weeks to visibly reduced wrinkles & dark spots*
90% agree skin feels instantly softer*
*Proven via independent consumer study conducted over 4 weeks on 52 participants with sensitive skin.

Key Ingredients:
Stabilised Vitamin C (tetrahexyldecyl ascorbate)
This stable, low-irritation form of vitamin C is incredibly effective on the skin; delivering exceptional protection against ageing free radicals. Supporting collagen production and brightening the skin tone, it leaves the complexion visibly more even, radiant and youthful-looking.

Vitamin E
Rich in antioxidants, vitamin E helps to protect the skin against ageing free radicals. It also helps to boost the power of vitamin C for maximum visible results.

Good to Know:
NO ARTIFICIAL FRAGRANCE
NO SYNTHETIC COLOURS
PARABEN FREE
CERTIFIED BY THE VEGAN SOCIETY

Directions

STEP 1
After cleansing in the morning, massage 4 drops across the face, neck and décolletage.

STEP 2
Leave to absorb before applying sunscreen. We recommend Advanced Day Ultimate Protect.

How to Layer C-Tetra
AM: Apply C-Tetra after cleansing and toning in your morning skincare routine. Always follow with sunscreen.

Ingredients

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

This list of ingredients may be subject to change, please consult the packaging of the product purchased.

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Rated 5 out of 5 by from Love this so much I buy as gifts This product is so good I often buy it as a gift. I choose this one for my daughters and the Lux for my friends. What ever their age they all love it too.
Date published: 2025-08-27
Rated 5 out of 5 by from Love this product makes my Love this product makes my skin feel amai g and the smell is gorgeous
Date published: 2025-08-27
Rated 5 out of 5 by from Absolutely amazing. C Tetra makes Absolutely amazing. C Tetra makes the texture of the skin absolutely superb, smooth and bright. Consistency of using it will improve your skin big time
Date published: 2025-08-27
Rated 5 out of 5 by from Love it Love this product and a little goes a long way so the bottle will last a while. It doesn’t leave an oily residue and makes my skin look fresh in the morning
Date published: 2025-08-27
Rated 5 out of 5 by from Oily but not greesy Again I love how medik8 products are easy and pleasant to apply, but vitamin C is not my fav ingredient
Date published: 2025-08-26
Rated 5 out of 5 by from On my third bottle! On my third bottle! Wouldn’t purchase any other vitamin C, gives me an instant glow and such a nice formula
Date published: 2025-08-26
Rated 3 out of 5 by from Requested review Vitamin C I quite like this product, it applies easily, sinks in to the skin quickly and dries quickly. It leaves the skin looking brighter. However it is far more expensive than a similar product I have previously used with the same results. I'll continue to use it to see how it goes moving forward
Date published: 2025-08-26
Rated 5 out of 5 by from This product is fantastic it This product is fantastic it feels great on my skin and gives it a healthy glow Really moisturising
Date published: 2025-08-26
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Can I use this serum under eyes?

Asked by: Anonymous
Yes absolutely! 
Answered by: Anonymous
Date published: 2023-05-24

What % vitamin c?

Asked by: Anonymous
The tetrahexyldecyl ascorbate (Vitamin C) in C-Tetra serum is 7%.
Answered by: Anonymous
Date published: 2023-05-24

What percentage of vitamin c does this contain?

Asked by: Anonymous
30%
Answered by: Anonymous
Date published: 2023-03-04
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