C-Tetra® Luxe
Close-up of a smiling model with glowing skin against a warm gradient background. Text highlights the product is clinically proven to provide a healthy glow in just one use, reduce visible wrinkles and hyperpigmentation in 4 weeks, and help strengthen the skin barrier.
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra® Luxe
A chart titled "Meet Your Vitamin C" displays four Medik8 serum bottles against a warm orange background with hexagonal graphics. It compares C-Tetra (7% Vitamin C) for sensitive skins or beginners, C-Tetra Luxe (14% Vitamin C) for dry skin, C-Tetra Advanced (20% Vitamin C) for normal, combination and oily skin, and Super C Ferulic (30% Ethylated L-Ascorbic Acid) for experienced users.
Layering guide chart displays a morning skincare routine against an orange background with oil bubble graphics. Medik8 C-Tetra Luxe serum bottle is highlighted as the Vitamin C step, following cleansing and toning, and preceding sunscreen. Text includes expert advice to pair with Vitamin A at night for maximum radiance and age-defying results.
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra Luxe Try Me - With Carton - Grey Background
C-Tetra® Luxe
C-Tetra® Luxe
Close-up of a smiling model with glowing skin against a warm gradient background. Text highlights the product is clinically proven to provide a healthy glow in just one use, reduce visible wrinkles and hyperpigmentation in 4 weeks, and help strengthen the skin barrier.
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra® Luxe
A chart titled "Meet Your Vitamin C" displays four Medik8 serum bottles against a warm orange background with hexagonal graphics. It compares C-Tetra (7% Vitamin C) for sensitive skins or beginners, C-Tetra Luxe (14% Vitamin C) for dry skin, C-Tetra Advanced (20% Vitamin C) for normal, combination and oily skin, and Super C Ferulic (30% Ethylated L-Ascorbic Acid) for experienced users.
Layering guide chart displays a morning skincare routine against an orange background with oil bubble graphics. Medik8 C-Tetra Luxe serum bottle is highlighted as the Vitamin C step, following cleansing and toning, and preceding sunscreen. Text includes expert advice to pair with Vitamin A at night for maximum radiance and age-defying results.
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra Luxe Try Me - With Carton - Grey Background
C-Tetra® Luxe
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Fine lines & wrinkles

C-Tetra® Luxe

  • Brighten
  • |
  • Smooth
  • |
  • Nourish
Lipid 14% Vitamin C Enhanced Radiance Serum

Supercharge your skin's radiance each morning with C-Tetra Luxe; clinically proven to reduce the appearance of wrinkles and hyperpigmentation in just 4 weeks.* It also works to boost visible radiance while supporting the skin barrier. Featuring twice the amount of vitamin C (14%) of our original C-Tetra serum, C-Tetra Luxe is ideal for those looking for enhanced skin radiance and antioxidant protection alongside deep nourishment.

The velvety-soft serum is formulated with a stabilised (and therefore very potent) form of vitamin C called tetrahexyldecyl ascorbate (pronounced 'tetra-hexul-deckul as-CORR-bate'), which delivers proven results after just 1 use*; all with a gentle, nourishing experience for your skin.

*Proven via independent clinical study on C-Tetra Luxe conducted over 4 weeks on 36 participants
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Reasons to shop Medik8

Fast & Tracked Shipping
15% off your first order
All taxes, custom fees and import duties included
Advanced Day Ultimate Protect™
Advanced Day Ultimate Protect™
  • Protect
  • |
  • Repair
  • |
  • Hydrate
 Age-Defying Moisturiser with Photolyase SPF 50+ | PA++++
Key Benefits
Instant Skin Youthfulness

Boosted with optimised red ginseng for proven skin-brightening and youth-boosting power.

Total Skin Nourishment

Enhanced with squalane and vitamin F for deep moisturisation and clinically proven skin barrier support.

Dark Spot Reduction

Delivers powerful, clinically proven action on the appearance of dark spots.

Proven Results
BEFORE
AFTER 8 WEEKS
BEFORE
AFTER 8 WEEKS
1 hour to visibly brighter, more youthful-looking skin*
7 days to improved skin radiance*
81% agree visible hyperpigmentation had reduced in just 4 weeks*
94% noticed smoother and softer skin after just 1 use*
86% reported it was the best vitamin C serum they had ever used*
*Proven via independent clinical study on C-Tetra Luxe conducted over 4 weeks on 36 participants
How to Use

First-time use

If you're new to C-Tetra Luxe 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 6 drops of C-Tetra Luxe across the face, neck and décolletage.

Step 2

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

Uses Per Tube

200

Key Ingredients
14% Stabilised Vitamin C (tetrahexyldecyl ascorbate)

A low-irritation form of vitamin C that delivers exceptional antioxidant protection against harmful free radical damage while supporting collagen production for a visibly even, more youthful-looking complexion.

Squalane

An almost skin-identical lipid which helps to support the natural skin barrier by nourishing the complexion.

Maracuja (pronounced 'marra-KU-ja') Oil

Naturally rich in nutrients and fatty acids, maracuja oil deeply nourishes your skin while providing additional antioxidant protection against free radical damage.

Optimised Red Ginseng

Boosts the serum’s brightening powers while stimulating collagen production for more youthful-looking skin.

Maracuja (pronounced 'marra-KU-ja') Oil

Naturally rich in nutrients and fatty acids, maracuja oil deeply nourishes your skin while providing additional antioxidant protection against free radical damage.

Optimised Red Ginseng

Boosts the serum’s brightening powers while stimulating collagen production for more youthful-looking skin.

Vitamin E

A powerful antioxidant that provides additional antioxidant protection against the ageing effects of free radicals. It also helps to boost the power of vitamin C for optimum visible results.

Full List of Ingredients
C-Tetra® Luxe
Lipid 14% 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.
  • Dermatologically tested
  • Clinically proven formula
  • No artifical fragrance
  • No synthetic colours
  • Paraben free
  • Alcohol free
  • Certified by the vegan society
Experts Recommended

Your skin needs this like the desert needs the rain!

POLLY VERNON
Features Writer - The Times

The perfect option for supercharged skin radiance plus visible line-smoothing results.

DANIEL ISAACS
Chief Product Officer

The Vitamin C Serum Range

C-Tetra®
Morning
C-Tetra®
(30ml) | $53
Texture

Lightweight Oil

Skin Types

Sensitive Skin

Key Ingredients
  • 7% Tetrahexyldecyl Ascorbate
  • Vitamin E
Benefits
  • Brightening
  • Skin Nourishment
C-Tetra® Luxe
Morning
C-Tetra® Luxe
(30ml) | $70
Texture

Rich Oil

Skin Types

Dry Skin

Key Ingredients
  • 14% Tetrahexyldecyl Ascorbate
  • Squalane
  • Maracuja Oil
Benefits
  • Brightening
  • Youth Boosting
  • Skin Nourishment
  • Dark Spot Reduction
C-Tetra® Advanced
Morning
C-Tetra® Advanced
(30ML) | $78
Texture

Lightweight Gel-Serum

Skin Types

All skin types, especially oily & combination

Key Ingredients
  • 20% Tetrahexyldecyl Ascorbate
  • Phyto Exosomes 
  • Acetyl Zingerone
Benefits
  • Brightening 
  • Age Defense
  • Skin Nourishment
  • Dark Spot Reduction
  • Smooth & Even Complexion

Complete Your Regime

Reviews

Frequently Asked Questions

Can I use C-Tetra Luxe if I'm pregnant or breastfeeding?
As general guidance, this product does not contain any ingredients which we would recommend to avoid during pregnancy, unless advised by your doctor.
What vitamin C strength is C-Tetra Luxe?
C-Tetra Luxe contains 14% stabilised vitamin C (tetrahexyldecyl ascorbate).
Can I use a vitamin C serum alongside vitamin A?
Absolutely. In fact we recommend it as part of our pioneering CSA Philosophy which champions vitamin C plus sunscreen by day, vitamin A by night as the simple secret to glowing, youthful-looking skin.
Can I layer C-Tetra Luxe with Clarity Peptides in the morning?
Yes, you can. We would recommend applying C-Tetra Luxe first (an oil-based serum), followed by Clarity Peptides (an emulsion-based serum).
C-Tetra® Luxe
(30ml)
Select a Size