Medik8 C-Tetra® 30ml
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
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 1 out of
5
by
Stephanie from
Reacted badly to it!
This was too much for my sensitive skin. I got contact dermatitis from using it, however I do have really sensitive skin.
Date published: 2025-04-19
Rated 1 out of
5
by
Lisa L. from
It feels luxurious initially I
It feels luxurious initially I thought I'd like it but I had a reaction after a few days which resulted in my skin being sore, burning & itchy so had to stop using.
Date published: 2025-04-18
Rated 5 out of
5
by
Kelly from
Third time purchasing
This has become a staple in my skincare routine. It's the one part that I've decided to consistently splurge on because I think it's worth it. I like the texture when it's applied and the subtle smell too.
Date published: 2025-04-15
Rated 5 out of
5
by
Poonam S. from
Luminosity in a bottle
I love this product because it makes my skin flawless upon using regularly and I saw results within the first week. The scent is lovely and it glides on so well. It has a dry touch finish so I wear it under make up too. This is a great introduction to vitamin c if you've not used vitamin c before. Really grateful for this lovely brown bottle.
Date published: 2025-04-14
Rated 5 out of
5
by
betul e. from
love it!
I have been using it for a couple of weeks. I love the consistency and great for my sensitive skin. I will continue to buy :)
Date published: 2025-04-14
Rated 4 out of
5
by
SANAM from
Brighter skin easily absorbed
I was unsure about the Vitamin C serum but this has been a game changer in my AM skincare routine. A few drops everyday, it is non irritating, easy to absorb and has left my skin brighter, more glowing and the dark marks from acne are fading.
Date published: 2025-04-10
Rated 5 out of
5
by
Emma R. from
Love this product
I love this product, it's great for no makeup days as it's oily so keeps me hydrated all day and gives my skin a lovely glow
Date published: 2025-04-10
Rated 5 out of
5
by
Yinyan L. from
Sensitive skin friendly
Great in combination with the toner and stabilises my skin
Date published: 2025-04-08
Can I use this serum under eyes?
Yes absolutely!
Date published: 2023-05-24
What % vitamin c?
The tetrahexyldecyl ascorbate (Vitamin C) in C-Tetra serum is 7%.
Date published: 2023-05-24
What percentage of vitamin c does this contain?
30%
Date published: 2023-03-04
