Medik8

C-Tetra®

Skincare

€71,95

Medik8's cult daily vitamin C serum, built on 7% stabilised tetrahexyldecyl ascorbate in a jojoba oil base. It brightens uneven tone and softens the look of fine lines while staying gentle enough for sensitive skin. A good first vitamin C, worn every morning under sunscreen.

size: 8ml
Ingredients

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

  • 7% stabilised vitamin C (tetrahexyldecyl ascorbate) — a low-irritation form of vitamin C that gives antioxidant protection against free radical damage while brightening and supporting collagen production.
  • Vitamin E — an antioxidant that adds further protection against free radicals and helps boost the power of the vitamin C.
  • Jojoba seed oil — the base of the formula, giving non-greasy nourishment for visibly softer, comforted skin.

No artificial fragrance. No synthetic colours. Paraben free. Certified by the Vegan Society.

How to use

  • After cleansing in the morning, massage 4 drops across the face, neck and décolletage.
  • Leave it to absorb before applying sunscreen.

Vitamin C in the morning and vitamin A at night is the pairing Medik8 build their routines around. There are roughly 200 uses in a bottle.

FAQ

Is it suitable for sensitive skin?
Yes. It uses THDA, a very gentle form of vitamin C, and Medik8 designed it with sensitivity in mind.
Do I need to use this before a stronger vitamin C?
No. Medik8's vitamin C range offers different strengths and textures rather than a ladder. If your skin is sensitive or you are new to vitamin C, this is the one to start with.
Does it contain fragrance?
No synthetic fragrance. It has a subtle citrus aroma from a very low concentration of essential oils.
How long does it stay effective once opened?
Medik8 formulate with an extremely stable form of vitamin C, and say it remains potent 12 months after opening.
Can I use it with a retinal?
Yes. Vitamin C in the morning, vitamin A at night.

Radiance, gently done.

Medik8's original vitamin C serum, built on 7% stabilised vitamin C (tetrahexyldecyl ascorbate) in a jojoba seed oil base. It works to visibly brighten uneven tone and reduce the look of fine lines, while staying gentle on sensitive skin.

Vitamin E is included alongside it for extra antioxidant protection against free radical damage. A good first vitamin C, and a sensible everyday morning step under sunscreen.

Recommended for:
All skin types, including sensitive skin and anyone new to vitamin C
Skin benefits:
Brightens tone, smooths the look of fine lines, antioxidant protection
Target concerns:
Dullness, uneven tone, fine lines, environmental damage
Texture:
Lightweight jojoba seed oil serum, non-greasy
Scent:
No synthetic fragrance; a subtle citrus aroma from low levels of essential oils
When to use:
Morning, before sunscreen
Size:
30ml
Medik8 C-Tetra®

Frequently asked questions

How long does shipping take?

Orders are typically delivered within 1-2 business days. Our team will contact you in advance to coordinate delivery.

Is this suitable for sensitive skin?

All formulas are dermatologist tested and fragrance free unless noted on the product.