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Medik8 C-Tetra® 30ml

Medik8 C-Tetra® 30ml

%0 4.74 | 708 reviews
Box

£39.00 (£1.30 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.

See more...

Rated 5 out of 5 by from C-Tetra Loving this product, absorbs particularly easily into the skin for an oil and sits really well under serums or moisturiser. This is my second bottle, I will be reordering.
Date published: 2025-03-21
Rated 5 out of 5 by from My favourite product I love this product. I like so much this nice orange fragrance. I can see Instant glow on face.
Date published: 2025-03-20
Rated 4 out of 5 by from Vitamin C from Medic I have mine third bottle and it’s amazing, definitely recommended this from Medic
Date published: 2025-03-20
Rated 5 out of 5 by from Vit c I ordered the sample size of this to try as use other Medik8 products and like them i have sensitive skin and never been able to use a vitamin c serum before but so far so good with this one I am taking it slowly and building up over the weeks I am liking the results.
Date published: 2025-03-19
Rated 5 out of 5 by from Love this product! Beautiful scent, consistency is thin so it sinks into your skin really quickly. Not used it for long enough to see any major differences yet but it’s a gorgeous addition to my skincare routine. Would highly recommend!
Date published: 2025-03-18
Rated 5 out of 5 by from Smells Devine and works a treat Smells absolutely wonderful and starting to see a difference in my skin after about 2-3 weeks daily use. Cannot recommend this product enough!
Date published: 2025-03-17
Rated 5 out of 5 by from Great serum Lovely serum that sinks in to the skin easily. I feel it has brightened and evened out my skin tone.
Date published: 2025-03-15
Rated 5 out of 5 by from Prefer this form of vitamin Prefer this form of vitamin c rather than the daily radiance moisturiser. I think it’s helped with evening skin tone a little and makes my skin look more glowy
Date published: 2025-03-15
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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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