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Medik8 C-Tetra Luxe

Medik8 C-Tetra Luxe

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Medik8 C-Tetra Luxe

Lipid Vitamin C Enhanced Radiance Serum


Medik8 C-Tetra Luxe is an optimised, low-irritant form of vitamin C, tetrahexyldecyl ascorbate, offering a smooth oil texture that can be easily integrated into any regimen. Squalane and vitamin F provide nourishment to the skin barrier for a balanced, visibly healthy complexion. Medik8 C-Tetra Luxe has been clinically proven to reduce wrinkle appearance and hyperpigmentation, restoring skin radiance in only seven days. Its potent yet gentle composition is also non-comedogenic, making it suitable for all skin types. C-Tetra Luxe is clinically proven to improve skin discolouration, revealing a brighter, more even and glowing complexion.
The Science Behind Medik8 C-Tetra Luxe

“C-Tetra Luxe is the pinnacle of our C-Tetra range. Containing double the amount of tetrahexyldecyl ascorbate and an infusion of radiance boosting antioxidants delivered in a nourishing squalane base, C-Tetra Luxe is the perfect all-rounder in our vitamin C range. We recommend this to the majority of skin types including those looking for intense anti-ageing results, drier and dehydrated skin types, and those looking for a powerful antioxidant serum that remains gentle on the skin despite its high concentration of vitamin C."
  • Daniel Isaacs, Medik8 Director of Research




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Powerful Yet Gentle Vitamin C

Elevating our C-Tetra range to new heights, C-Tetra Luxe features double the level of vitamin C (tetrahexyldecyl ascorbate) found in the original serum - perfect for those looking for proven visible age-defying and brightening results.

Restores Visible Radiance
Vitamin C is joined by fermented red ginseng and maracuja oil for an all round unbeatable glow and healthy-looking, dewy skin.
Total Nourishment

The velvety serum also features squalane and vitamin F to deeply moisturise the skin. The silky formula is clinically proven to help strengthen the natural skin barrier, which ideal for dry and dehydrated skin types.

Perfect Pair
When combined, vitamin C and sunscreen give skin the ultimate protection against the sun and environment throughout the day, to minimise visible signs of premature ageing. Shop our recommended day cream, Advanced Day Ultimate Protect, here.

How It Works

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 latch onto the defenceless skin cells, causing irreparable damage, which ultimately leads to premature skin ageing.

C-Tetra Luxe offers optimum skin protection from free radical damage, featuring elevated levels of vitamin C to boost the natural antioxidant defence levels in the skin. Vitamin C is a key pillar of our CSA Philosophy, due to being one of the most powerful vitamins for helping to prevent the signs of premature skin ageing. Vitamin C also helps to improve the appearance of fine lines and wrinkles, and can help to brighten the appearance of dark spots and uneven skin tone. The result? Visibly radiant, more youthful-looking skin. C-Tetra contains an enhanced level of tetrahexyldecyl ascorbate, a form of vitamin C which is a stabilised modification of ascorbic acid (the purest form of vitamin C) that is gentle on the skin yet proven to deliver visible results. C-Tetra Luxe has double the level of tetrahexyldecyl ascorbate found in the original C-Tetra serum, for improved visible results.

Infused with Amazonian maracuja oil, C-Tetra Luxe is powered by the exotic antioxidant properties that originate from the passion fruit. Sustainably-sourced, our maracuja oil is naturally rich in vitamin E and linoleic acid, renowned for its nourishing and protective qualities on the skin. The superfruit helps to leave skin looking firmer and smoother with a noticeable glow.

The intense brightening power of C-Tetra Luxe is supercharged with the influence of optimised red ginseng. With incredible abilities as a potent tyrosinase-inhibitor, the botanical component works with vitamin C to restore the appearance of skin’s natural radiant, even tone.

All of the above technologies are delivered with ease in a silky squalane-base combined with vitamin F to envelope the complexion in total nourishment that feels rich with moisture all day long, while helping to nurture the skin's natural barrier.

How To Use

After cleansing in the morning, massage 6 drops of C-Tetra Luxe across the face, neck and décolletage.

Leave to absorb before applying sunscreen. We recommend Advanced Day Ultimate Protect.

Patch testing prior to use is advised. Refer to for an in-depth guide to patch testing.

Interested in routines & layering?

C-Tetra Luxe features in many of our carefully curated regime guides, including our Beautiful Skin Everyday regime. Click the link for additional product recommendations and easy-to-follow layering advice.


​Tetrahexyldecyl Ascorbate​
A lipid-soluble form of vitamin C that provides exceptional antioxidant protection from harmful free radicals, while improving the visible signs of premature ageing for a youthful-looking 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.

A natural emollient; squalane helps to restore the skin’s natural defensive barrier while deeply hydrating the skin.

Maracuja Oil
Naturally rich in nutrients, maracuja oil nourishes the complexion with fatty acids and provides an antioxidant protective shield.

Optimised Red Ginseng
Extracted from the root of red ginseng, this natural extract boosts the serum’s brightening powers.

Full Ingredients

Lipid Vitamin C Enhanced Radiance Serum
Squalane, Simmondsia Chinensis (Jojoba) Seed Oil, Tetrahexyldecyl Ascorbate, Dimethicone, Candida Bombicola/Glucose/Methyl Rapeseedate Ferment, Citrus Grandis (Grapefruit) Peel Oil, Ethyl Linoleate, Passiflora Edulis (Passion Fruit) Seed Oil, Tocopheryl Acetate, Helianthus Annuus (Sunflower) Seed Oil, Olea Europaea (Olive) Fruit Oil, Panax Ginseng Root Oil, Prunus Amygdalus Dulcis (Sweet Almond) Oil, Prunus Armeniaca (Apricot) Kernel Oil, PPG-12/SMDI Copolymer, Limonene, Citral, Linalool, Geraniol.

*Although we try our best to ensure this list of ingredients is accurate there may be product upgrades from time to time, or slight variants between different regions based on local laws, meaning the only definitive ingredient list is that which is printed on the product packaging.


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