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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Before After
  • 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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  • The ultimate plant-based vitamin A alternative.

    DANIEL ISAACS
    Chief Product Officer
  • 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
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    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.

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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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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 6 months after you first opened it.

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®
MEDIK8 ON INSTAGRAM
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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REVIEWS