C-Tetra® Luxe
Close-up of a smiling woman with glowing skin on a warm orange background. Text reads: ‘Clinically proven to: Healthy glow in just 7 days*. Reduces visible wrinkles and hyperpigmentation in 4 weeks*. Helps to strengthen your skin barrier.’
Before and after comparison of skin texture with a bottle of Medik8 serum.
Medik8 skincare routine guide titled ‘How to Layer.’ The image shows illustrated product packaging arranged by morning and evening use, including cleanser, toner, vitamin C serum, and sunscreen, with expert layering advice displayed below.
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra Luxe Try Me - With Carton - Grey Background
C-Tetra® Luxe
Close-up of a smiling woman with glowing skin on a warm orange background. Text reads: ‘Clinically proven to: Healthy glow in just 7 days*. Reduces visible wrinkles and hyperpigmentation in 4 weeks*. Helps to strengthen your skin barrier.’
Before and after comparison of skin texture with a bottle of Medik8 serum.
Medik8 skincare routine guide titled ‘How to Layer.’ The image shows illustrated product packaging arranged by morning and evening use, including cleanser, toner, vitamin C serum, and sunscreen, with expert layering advice displayed below.
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra® Luxe
C-Tetra Luxe Try Me - With Carton - Grey Background
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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 32 participants
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A white tube of Advanced Day Ultimate Protect stands upright, with a swipe of light cream next to it.
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

Guide to Layering
Step 1: Cleanse
Surface Radiance Cleanse™
Morning
Evening
Surface Radiance Cleanse™
Select a Size
Step 2: Target
Liquid Peptides Advanced MP
Morning
Evening
Liquid Peptides Advanced MP
(0)
Step 3: Brighten
C-Tetra® Luxe
Morning
C-Tetra® Luxe
Select a Size
Step 4: Renew
Evening
()
Step 5: Moisturise
Morning
Evening
()
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

INGREDIENTS

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

PRECAUTIONS

Avoid eye contact. If product enters eyes, rinse well with water. If irritation occurs, cease use. Should irritation persist, consult a doctor. Use only as directed and on unbroken skin. Patch testing prior to use is advised. Refer to medik8.co/patch for an in-depth guide to patch testing. Keep out of reach of children.

*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
  • Used in professional treatments
Experts Recommended

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

DANIEL ISAACS
Chief Product Officer
A portrait of a Medik8 skincare scientist and founder wearing a branded lab coat, representing the research and innovation behind the formulation.

Your skin needs this like the desert needs the rain!

POLLY VERNON
Features Writer - The Times

The Vitamin C Serum Range

C-Tetra®
Morning
C-Tetra®
(30ml) | €56
Texture
  • Brightening
  • Skin Nourishment
Skin Types

Sensitive Skin

Key Ingredients

Lightweight Oil

Benefits
  • 7% Tetrahexyldecyl Ascorbate
  • Vitamin E
C-Tetra® Luxe
Morning
C-Tetra® Luxe
(30ml) | €82
Texture
  • Brightening
  • Youth Boosting
  • Skin Nourishment
  • Dark Spot Reduction
Skin Types

Dry Skin

Key Ingredients

Rich Oil

Benefits
  • 14% Tetrahexyldecyl Ascorbate
  • Squalane
  • Maracuja Oil
C-Tetra Advanced
Morning
C-Tetra Advanced
| €85
Texture
  • Brightening 
  • Age Defense
  • Skin Nourishment
  • Dark Spot Reduction
  • Smooth & Even Complexion
Skin Types

All skin types, especially oily & combination

Key Ingredients

Lightweight Gel-Serum

Benefits
  • 20% Tetrahexyldecyl Ascorbate
  • Phyto Exosomes 
  • Acetyl Zingerone

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