C-Tetra™

Lipid 7% Vitamin C Radiance Serum Full Details

  • Benefits
  • Brighten
  • Even
  • Renew
Bestseller
C-Tetra™
C-Tetra™
C-Tetra™
C-Tetra™
C-Tetra™
C-Tetra™
C-Tetra™
C-Tetra™
C-Tetra™
C-Tetra™
C-Tetra™
C-Tetra™

C-Tetra™

Lipid 7% Vitamin C Radiance Serum Full Details

  • Benefits
  • Brighten
  • Even
  • Renew
Not available for purchase

Sorry, this product is currently out of stock

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

Formulated with a stabilized form of vitamin C (7%) called tetrahexyldecyl ascorbate, 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 helps to promote a more youthful and healthy-looking complexion overall. The perfect option for those who are new to vitamin C, or those with sensitive skin. 
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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Before After
  • 4 weeks to visibly brighten skin*
  • 4 weeks to visibly improve evenness of skin tone*
  • 4 weeks to visibly improve skin radiance*

*Proven via independent consumer study conducted over 4 weeks on 52 participants with sensitive skin.
HOW TO USE
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If you're new to C-Tetra, we recommend a patch test at least 24 hours before first use. Learn how to patch test here.

Step 1

After cleansing in the morning, massage 4 drops across the face, neck and décolletage.

Step 2

As part of our CSA Philosophy, we recommend using vitamin C plus sunscreen in the morning and vitamin A at night. 

Not sure what order to layer your serums? Take our serums layering guide quiz here.
KEY INGREDIENTS
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  • Ingredient Icon 1
    7% Stabilized 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 the skin's natural collagen levels for a visibly even, more youthful-looking complexion.

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    Vitamin E

    A powerful antioxidant, vitamin E works to deeply nourish and soften the complexion.

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    Centella Asiatica

    Rich in soothing properties, centella asiatica helps to soothe and support all skin types, especially sensitive skins. .

  • 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 6 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 COLORS
  • Circular Checkmark Icon PARABEN FREE
  • Circular Checkmark Icon CERTIFIED BY THE VEGAN SOCIETY
GUIDE TO LAYERING
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Not sure where to start? Create your customized skincare routine in 8 clicks.
FAQS
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C-Tetra™
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