C-Tetra® Luxe (Travel Size)

An 8ml brown glass dropper bottle of Medik8 C-Tetra Luxe serum stands next to its white packaging box on a grey surface against a white background. Text on both reads: "Medik8, C-TETRA LUXE, Lipid Vitamin C Enhanced Radiance Serum, 8mL e / 0.27 Fl. Oz.".
Close-up of a person's face being treated with a glass pipette, set against a dark, warm-toned background. The text states the product is "CLINICALLY PROVEN TO:" followed by three check-marked claims: "Give skin a healthy glow after just 1 use*", "Reduce the look of wrinkles & hyperpigmentation*", and "Strengthen the skin's natural barrer". A footer note specifies these results are proven via an independent clinical study.
Before and after comparison of a participant’s forehead over 4 weeks, with a white dotted circle highlighting a visible reduction in the look of fine lines and wrinkles. The bottom of the image features a warm orange-gold background with a Medik8 C-Tetra Luxe serum bottle and the claim "86% reported that it was the best Vitamin C serum they had ever tried*."
C-Tetra® Luxe (Travel Size)
C-Tetra® Luxe (Travel Size)
Dr. Bibi Ghalaie, Cosmetic Physician, smiles while wearing a white Medik8 lab coat and holding a brown bottle of C-Tetra Luxe. A quote beside her states: "Medik8’s C-Tetra Luxe is my go to vitamin C. Used daily, it’s the key to retaining my glow.".
C-Tetra® Luxe (Travel Size)
C-Tetra® Luxe (Travel Size)
An 8ml brown glass dropper bottle of Medik8 C-Tetra Luxe serum stands next to its white packaging box on a grey surface against a white background. Text on both reads: "Medik8, C-TETRA LUXE, Lipid Vitamin C Enhanced Radiance Serum, 8mL e / 0.27 Fl. Oz.".
Close-up of a person's face being treated with a glass pipette, set against a dark, warm-toned background. The text states the product is "CLINICALLY PROVEN TO:" followed by three check-marked claims: "Give skin a healthy glow after just 1 use*", "Reduce the look of wrinkles & hyperpigmentation*", and "Strengthen the skin's natural barrer". A footer note specifies these results are proven via an independent clinical study.
Before and after comparison of a participant’s forehead over 4 weeks, with a white dotted circle highlighting a visible reduction in the look of fine lines and wrinkles. The bottom of the image features a warm orange-gold background with a Medik8 C-Tetra Luxe serum bottle and the claim "86% reported that it was the best Vitamin C serum they had ever tried*."
C-Tetra® Luxe (Travel Size)
C-Tetra® Luxe (Travel Size)
Dr. Bibi Ghalaie, Cosmetic Physician, smiles while wearing a white Medik8 lab coat and holding a brown bottle of C-Tetra Luxe. A quote beside her states: "Medik8’s C-Tetra Luxe is my go to vitamin C. Used daily, it’s the key to retaining my glow.".
C-Tetra® Luxe (Travel Size)
C-Tetra® Luxe (Travel Size)
1 / 9

C-Tetra® Luxe (Travel Size)

  • Brighten
  • |
  • Smooth
  • |
  • Nourish
Lipid 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.

Please Note: Product packaging shown may be different to the product received due to regional variations

*Proven via independent clinical study on C-Tetra Luxe conducted over 4 weeks on 36 participants
Travel Size (8ml)
Earn points
Reward Points

Earn 1 point for every £1 spent with our rewards program, Me&Medik8. Simply create an account to join. Collect points every time you shop and redeem them for rewards, including money off future purchases.

You can also enjoy lots of exclusive benefits from secret promotions, free shipping and a gift on your birthday.

Join Medik8 Loyalty to earn points when you shop this product. Sign up now
A close-up of a smartphone displaying a beauty app on its screen, showing a woman's face with a white geometric facial mapping overlay. The phone is centered against a blurred background of the same woman's face.

Build your routine

Discover Medik8 AI Skin Advisor
Start now

Reasons to shop Medik8

Free UK delivery over £25
15% off your first order
"No questions asked" easy 30 day returns
View our verified proof
Sustainability

Provenance provides confidence for sustainability claims; helping to prevent 'green-washing' and empowering conscious consumers to purchase in line with their values. Provenance 'Proof Points' are all third party verified and evidenced through supply chains.

Product proof points

The Vegan Society- Vegan

C-Tetra Luxe is Vegan Society certified — free from animal ingredients. No animals used in the product's manufacturing or testing. Free from GMOs. Reviewed by the Vegan Society.

Partly Recyclable Packaging

Recyclable Parts: Bottle (glass) and Container (cardboard) Non-Recyclable Parts: Pipette

Brand proof points

B Corporation

Medik8 is a certified B Corporation, scoring over 80 out of 200 across Governance, Workers, Community, Environment and Customers. The certification includes a legal commitment to consider all stakeholders in decision-making. Verified every three years.

SBTi Approved Targets

Medik8 has SBTi approved science-based targets to reduce greenhouse gas emissions in line with limiting global warming to 1.5°C or well-below 2°C. Progress is reported publicly every year, with targets validated by the certifier and reviewed every 5 years.

Living Wage Employer

Medik8 is a Living Wage Employer — all staff are paid a wage calculated to meet the cost of living in the UK. Company wages are updated annually after new rates are announced by the Living Wage Foundation.

Donates to Charity

In 2022 Medik8 donated £10,000 to the National Society for the Prevention of Cruelty to Children

Carbon Measured

The footprint was calculated using GHG Protocol methodology; GWP 100.

Renewable Energy

Medik8's Innovation Centre uses electricity from 100% renewable sources.

Made in Britain

Medik8 carries the Made in Britain trademark — manufactured in the United Kingdom. Subject to facility verification and annual renewal.

Powered by Provenance
Medik8 AI Skin Advisor Medik8 AI Skin Advisor Medik8 AI Skin Advisor

Medik8 AI Skin Advisor

Build your routine

Product Details

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. | Please Note: Product packaging shown may be different to the product received due to regional variations.

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.

Key Ingredients
A clean black-and-white line icon representing stabilised vitamin C (tetrahexyldecyl ascorbate). The design features a droplet with two sparkling stars to signify the ingredient’s skin-brightening and radiance-boosting properties.

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.

A clean, black-and-white line icon representing vitamin E. The design features a serum droplet with a small plus sign (+) in the top-right corner, symbolizing the ingredient’s antioxidant-boosting and stabilizing properties.

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 (Travel Size)
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.

Experts Recommended

"Your skin needs this like the desert needs the rain!"

POLLY VERNON
Features Writer - The Times

Luxurious and non-irritating...I love this product!

BRIAN R
Verified Medik8 Customer

Complete Your Regime

Reviews

C-Tetra® Luxe (Travel Size)
Travel Size (8ml)
Travel Size (8ml)