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Restore the look of skin radiance in just 7 days* with cult-favourite C-Tetra.

Formulated with a stabilised form of vitamin C (7%) called tetrahexyldecyl ascorbate (pronounced 'tetra-hexul-deckul as-CORR-bate'), this lightweight serum works to visibly brighten uneven skin tone and reduce the look of fine lines and wrinkles, while remaining gentle on sensitive skin.

Fortified with vitamin E, this antioxidant powerhouse also protects the skin against the ageing and damaging effects of free radicals for a more youthful and healthy-looking complexion overall. The perfect option for those who are new to vitamin C, or those with sensitive skin.

*Proven via independent consumer study conducted over 4 weeks on 52 participants with sensitive skin.

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C-Tetra®

Lipid 7% Vitamin C Radiance Serum Full Details

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C-Tetra®
KEY BENEFITS
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    Increased Skin Youthfulness

    Proven to simultaneously smooth the look of fine lines and wrinkles while visibly boosting skin glow and radiance.

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    Brighter, More Even Complexion

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

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    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
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  • 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
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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
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  • Endorsement Icon 1

    Softens visible ageing concerns while being tolerable for all.

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

    TATIANA S
    Verified Medik8 Customer
KEY INGREDIENTS
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    7% Stabilised Vitamin C (tetrahexyldecyl ascorbate)

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

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    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
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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
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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
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  • Circular Checkmark Icon NO ARTIFICIAL FRAGRANCE
  • Circular Checkmark Icon NO SYNTHETIC COLOURS
  • Circular Checkmark Icon PARABEN FREE
  • Circular Checkmark Icon CERTIFIED BY THE VEGAN SOCIETY
FAQS
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C-Tetra®
HEAR FROM OUR COMMUNITY
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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