Bestseller

Restore radiance and fight signs of ageing with C-Tetra, a vitamin C antioxidant serum that protects against environmental stressors while brightening skin.

C-Tetra® (Travel Size)

Lipid Vitamin C Radiance Serum Full Details

Size: 8ml

Product variants

KEY BENEFITS

Increased Skin Youthfulness

Proven to simultaneously smooth the look of fine lines and wrinkles while visibly boosting skin glow and radiance.
Brighter, More Even Complexion

Proven to visibly brighten the skin tone, for a more even and healthy-looking skin appearance.
Lightweight Nourishment

This jojoba (pronounced 'huh-hoh-ba') seed oil-based formula delivers effective yet non-greasy nourishment for visibly softer and comforted skin.

PROVEN RESULTS

7 days to restored skin radiance*
7 days to visibly brighter smoother skin*
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.

HOW TO USE

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.

LOVED & RECOMMENDED

Softens visible ageing concerns while being tolerable for all.

BRIDGET MARCH

Digital Beauty Director - Harper's Bazaar
My wrinkles have almost disappeared!

TATIANA S

Verified Medik8 Customer

KEY INGREDIENTS

7% Stabilised Vitamin C (tetrahexyldecyl ascorbate)

A low-irritation form of vitamin C that delivers exceptional antioxidant protection against harmful free radical damage while supporting collagen production for a visibly even, more youthful-looking complexion.
Vitamin E

A powerful antioxidant that provides additional antioxidant protection against the ageing effects of free radicals. It also helps to boost the power of vitamin C for optimum visible results.
Full Ingredients

THE SCIENCE BEHIND THE FORMULA

Ultra-gentle & perfect for visibly radiant skin

DANIEL ISAACS Chief Product Officer

It is exceptionally difficult to formulate a vitamin C serum that will retain its power over time. That's because vitamin C is notoriously unstable, meaning its effectiveness can be compromised when it comes into contact with light, heat or air.

That's why we have chosen to formulate C-Tetra with an extremely stable form of vitamin C (tetrahexyldecyl ascorbate), so you can be sure that your vitamin C is still as potent and effective 12 months after you first opened it.

SUSTAINABILITY CLAIMS

Provenance provides confidence for sustainability claims; helping to prevent ‘green-washing’ and empowering conscious consumers to purchase in line with their values. Provenance ‘Proof Points’ are all third party verified and evidenced through supply chains.

GOOD TO KNOW

NO ARTIFICIAL FRAGRANCE
NO SYNTHETIC COLOURS
PARABEN FREE
CERTIFIED BY THE VEGAN SOCIETY

FAQS

Can I use C-Tetra if I'm pregnant or breastfeeding?

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As a cosmetics company, we are unable to provide product advice in relation to medical conditions such as pregnancy. We would recommend discussing the ingredients with your GP or midwife before use. As general guidance, this product does not contain any ingredients which we would recommend to avoid during pregnancy, unless advised by your doctor.
Can I use C-Tetra alongside vitamin A?

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Absolutely. In fact we recommend it as part of our pioneering CSA Philosophy which champions vitamin C plus sunscreen by day, vitamin A by night as the simple secret to glowing, youthful-looking skin.
What's the difference between C-Tetra and C-Tetra Luxe?

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C-Tetra is our original, best-selling vitamin C serum. It's the perfect option for those who are new to vitamin C or those with sensitive skin, who still want visible age-defying results. C-Tetra Luxe is our supercharged vitamin C serum - ideal for those looking for clinical brightening and nourishing power. Both serums are formulated with stabilised tetrahexyldecyl ascorbate.

C-Tetra® (Travel Size)

HEAR FROM OUR COMMUNITY @officialmedik8

Complete Your Regime

For enhanced age-defying results, we especially recommend using this product alongside our industry-leading vitamin C and sunscreen formulas - as per our pioneering CSA Philosophy.

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C-Tetra® (Travel Size)

Lipid Vitamin C Radiance Serum Full Details

Sorry, this product is currently out of stock

KEY BENEFITS

Increased Skin Youthfulness

Brighter, More Even Complexion

Lightweight Nourishment

PROVEN RESULTS

HOW TO USE

STEP 1

STEP 2

LOVED & RECOMMENDED

KEY INGREDIENTS

THE SCIENCE BEHIND THE FORMULA

SUSTAINABILITY CLAIMS

GOOD TO KNOW

FAQS

Can I use C-Tetra if I'm pregnant or breastfeeding?

Can I use C-Tetra alongside vitamin A?

What's the difference between C-Tetra and C-Tetra Luxe?

Complete Your Regime

REVIEWS