Medik8 C-TETRA Lipid Vitamin C Radiance Serum

Medik8 C-TETRA Lipid Vitamin C Radiance Serum

This lightweight vitamin C serum restores skin's radiance and minimizes visible signs of skin aging. Give your skin a boost with C-Tetra serum for a radiant and youthful complexion.

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  1. In the morning after cleansing, massage 4 drops onto the face, neck and décolleté
  2. Allow to absorb before applying sunscreen. We recommend Advanced Day Total Protect.
  3. Patch testing prior to use is advised.

Simmondsia Chinensis (Jojoba) Seed Oil, Cyclopentasiloxane, Cyclohexasiloxane, Tetrahexyldecyl Ascorbate, Citrus Grandis (Grapefruit) Peel Oil, Tocopheryl Acetate, PPG-12/SMDI Copolymer, Limonene, Citral, Linalool, Geraniol.



Your skin contains natural antioxidants that work to defend against free radicals from the environment. When these environmental free radicals outweigh your skin's antioxidants, the skin can no longer protect itself. Free radicals attach to defenseless skin cells and cause irreparable damage, ultimately leading to premature skin aging.

  1. C-Tetra works to protect the skin from free radical damage, with Vitamin C to boost natural antioxidant defense levels in the skin. Vitamin C is an important pillar of our CSA philosophy, because it is one of the most powerful vitamins for preventing the signs of premature skin aging. Vitamin C also helps stimulate collagen production and can disrupt the overproduction of melanin to brighten dark spots and uneven skin tone. The result? Visibly radiant, healthier, more youthful-looking skin. C-Tetra contains tetrahexyldecyl ascorbate, a form of vitamin C that is a stabilized modification of ascorbic acid (the purest form of vitamin C) that is gentle on the skin and proven to produce visible results.
  2. Vitamin C and Vitamin E work synergistically as 'network antioxidants', boosting the overall antioxidant effect of the serum to keep skin protected all day long.
  3. C-Tetra is based on jojoba seed oil, for lightweight nourishment and a radiant appearance. The natural emollient oil glides effortlessly into the skin barrier and delivers the benefits of vitamin C with ease.
  4. Perfect pairIn combination, vitamin C and sunscreen give the skin ultimate protection against the sun and the environment all day long, to minimize signs of premature skin aging. Buy our recommended SPF day cream Advanced Day Total Protect.


The C-Tetra facial serum promotes a youthful-looking, radiant skin complexion. The skin immediately feels soft, supple and smooth.

Tetrahexyldecyl Ascorbate

A fat-soluble form of vitamin C that provides exceptional antioxidant protection against damaging free radicals while boosting collagen production for youthful skin.

Vitamin E

A fat-soluble antioxidant naturally present in the skin. Vitamin E protects the skin against free radicals and is regenerated by vitamin C for optimal strength.

  • Daily Glow

The silky-soft serum with jojoba oil makes the skin effortlessly radiant and cares for it
a visible, healthy glow.

  • Antioxidant power

Vitamins C and E provide daily protection against harmful free radicals
generated by sun exposure and premature skin aging
can cause.

  • Gentle yet effective

Tetrahexyldecyl ascorbate is a stabilized, gentle form of vitamin C, which makes it...
is perfect for people who are just starting with vitamin C or for sensitive ones
skin types that do not want to compromise on results.

Vitamin C minimizes the appearance of fine lines and wrinkles over time, while helping to visibly balance and brighten skin tone.

This lightweight vitamin C serum restores skin's radiance and minimizes visible signs of skin aging. Give your skin a boost with C-Tetra serum for a radiant and youthful complexion.