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Medik8 C-Tetra
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Medik8 C-Tetra
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Medik8 C-Tetra
Medik8 C-Tetra

Medik8 C-Tetra

From £14.00
+Derma Points

A lightweight daily vitamin C serum that brightens, protects and stimulates collagen for a more radiant, even-toned complexion.

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Order by 3PM weekdays for same day dispatch
Dry Skin
Pigmentation
Sensitive Skin
Redness & Rosacea
Oily Skin
Acne / Blemish-Prone

Defend your skin against daily environmental damage with Medik8 C-Tetra — a fast-absorbing antioxidant serum powered by a gentle yet high-performing form of vitamin C.

Formulated with Tetrahexyldecyl Ascorbate, a stabilised, lipid-soluble vitamin C derivative, it penetrates deeply to boost collagen production, fade dullness and improve uneven tone. Paired with Vitamin E, it delivers synergistic antioxidant protection, shielding skin from pollution, UV stress and premature ageing.

The ultra-light, dry-touch oil texture sinks in instantly without greasiness, making it ideal for first-time vitamin C users or those with sensitive skin. With consistent use, skin appears brighter, firmer and more youthful with a lasting healthy glow.

Simple, effective and perfect for everyday antioxidant defense.

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

Key Ingredients: Tetrahexyldecyl Ascorbate – A lipid-soluble form of vitamin C that provides exceptional antioxidant protection from harmful free radicals, while stimulating collagen production for a youthful complexion Vitamin E – A lipid-soluble antioxidant that is naturally present in the skin. Vitamin E protects the skin from free radicals and is regenerated by vitamin C for optimum power All Ingredients: Simmondsia Chinensis (Jojoba) Seed Oil, Cyclopentasiloxane, Cyclohexasiloxane, Tetrahexyldecyl Ascorbate, Tocopheryl Acetate, PPG-12/SMDI Copolymer, Citrus Grandis (Grapefruit) Peel Oil, Limonene.

Medik8

Medik8 products are built on the ground breaking methodology of the CSA philosophy. The simple yet impactful skincare regime follows the approach of Vitamin C + Sunscreen by day and Vitamin A by night.

Medik8 Vitamin C products like Medik8 C-Tetra focuses on building shields against daily life while promoting the production of collagen.

Medik8 sunscreen products like Medik8 Advanced Day Total Protect focus on high strengths sun protection to protect your skin from sun damage

Medik8 Vitamin A night creams and serums focus on cellular renewal and reduce production of sebum. Whether you’re starting out with Crystal Retinal 1 or advanced Intelligent Retinol 10TR, Medik8 Vitamin A serums are some of the most advanced in skincare

Vitamin C, Vitamin E, Antioxidants

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Ingredient
Vitamin C
What It Is

Vitamin C is an essential nutrient required for the growth and repair of tissues in all parts of the body, including the skin, but we cannot produce it on our own. The powerful antioxidant is found naturally in fruits and vegetables and commonly produced synthetically in skincare products, such as moisturisers, toners, and, most often, serums.

What It Does

How to use in your skincare routine?

Whether your skin is dry, oily, or a combination, vitamin C is beneficial for skin health, helping it look and feel healthier and younger longer.

Before you apply the vitamin C, test a patch of skin with a lower-concentration formula to see how your skin reacts. Some minor tingling is normal, but if you experience anything more intense, stop using the product and talk to your dermatologist.

For best results, apply this vitamin topically 1-2 times a day, morning and night. Be sure to apply a moisturiser with a broad-spectrum SPF after vitamin C application for daytime.

Benefits
  • Vitamin C makes sun damage and surface pigment spots less visible and brightens a dull, blotchy skin.
  • It is a powerful antioxidant that protects the skin from irritation, inflammation and environmental pollution.
  • It reduces red blotches left after spots by improving the skin’s natural healing process.
  • It increases the effectiveness of sunscreen and gives the skin better protection from UV rays 
Vitamin E
What It Is

Vitamin E is a fat-soluble, essential nutrient with anti-inflammatory properties. Vitamin E helps support the immune system, cell function, and skin health. It’s an antioxidant, making it effective at combating the effects of free radicals produced by the metabolism of food and toxins in the environment.

Vitamin E is a powerful antioxidant that may be effective at reducing UV damage in skin. And when applied topically may help nourish and protect your skin from damage caused by free radicals.

What It Does

How to use in your skincare routine?

It can be used underneath moisturiser and sunscreen in the morning [if it’s a vitamin E oil] and is sometimes combined with other antioxidants, such as Vitamin C in Serums.

Best suited for those with dry, very dry, or mature skin.

Avoid using if you have very oily, acne prone skin or those prone to sensitivity.

Benefits

In moisturisers it can:

  • Stop skin from losing moisture.
  • Protect cells from damage.
  • Soften skin.
Antioxidants