Medik8 C-Tetra® Luxe | Lipid Vitamin C Enhanced Radiance Serum | 30ml

Additional Product Information

Size: 30ml (approximately 6 months supply when used as directed)

Texture: Velvety-soft, silky oil-based serum

Skin Type Suitability: All skin types, particularly beneficial for dry, dehydrated and sensitive skin

Clinical Testing: Clinically proven via independent study conducted over 4 weeks on 36 participants

Free-From Claims: No artificial fragrance, no synthetic colours, paraben free, alcohol free

Special Notes

Certifications: Certified by The Vegan Society, Dermatologically Tested

Free-From Status: Cruelty-free (never tested on animals), vegan, artificial fragrance-free, paraben-free, alcohol-free

Professional Use: Used in professional treatments

Unique Features: Part of Medik8's pioneering CSA Philosophy (Vitamin C + Sunscreen by day, Vitamin A by night). Features stabilised vitamin C that maintains potency throughout product life. Contains double the vitamin C concentration of original C-Tetra serum.

Pregnancy: As general guidance, this product does not contain ingredients to avoid during pregnancy, unless advised by your doctor

How To Use

Application: After cleansing in the morning, massage 6 drops of C-Tetra® Luxe across the face, neck and décolletage. The lightweight serum absorbs quickly into skin.

Frequency: Use once daily in the morning as part of your daytime skincare routine

Timing: Apply after cleansing and before sunscreen. Leave to absorb fully before applying SPF protection

Layering: C-Tetra® Luxe is an oil-based serum. If using with other serums, apply C-Tetra® Luxe first, followed by water-based or emulsion serums. Always finish with sunscreen (we recommend Medik8 Advanced Day Total Protect)

Expert Tips: For optimal results, incorporate C-Tetra® Luxe into Medik8's CSA Philosophy by pairing with sunscreen during the day and using a vitamin A serum in the evening. Patch testing prior to use is advised - refer to medik8.co/patch for comprehensive patch testing guidance

Full Ingredients List

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.

Please note: Formulations are updated periodically by manufacturers without notice. Therefore, the ingredient lists on this website may differ from the product packaging depending on the time and country of purchase. Please refer to your product packaging for accurate ingredient lists. A patch test before use must be carried out for suitability.

FAQ

Q: How does C-Tetra® Luxe differ from the original C-Tetra serum?
A: C-Tetra® Luxe contains double the concentration of lipid-soluble vitamin C (14% compared to 7%), plus additional brightening and nourishing ingredients including optimised red ginseng, maracuja oil, vitamin F and squalane. Clinical studies demonstrate enhanced visible results in radiance, wrinkles and hyperpigmentation compared to the original formulation.

Q: Is this suitable for sensitive skin despite the high vitamin C concentration?
A: Absolutely. C-Tetra® Luxe is formulated with tetrahexyldecyl ascorbate, a stabilised form of vitamin C that delivers powerful results without the irritation often associated with high-strength vitamin C serums. Clinical studies on sensitive skin participants demonstrated excellent tolerance, with 94% noticing smoother, softer skin after just one use.

Q: When will I see results?
A: Clinical studies demonstrate visible brightening within just 1 hour of first application. Improved skin radiance becomes evident within 7 days of consistent use. For optimal results in reducing hyperpigmentation and wrinkles, continued use over 4 weeks shows significant visible improvements, with 81% of study participants reporting reduced dark spots.

Q: Can I use this if I'm new to vitamin C serums?
A: Yes, whilst C-Tetra® Luxe contains an enhanced 14% vitamin C concentration, the stabilised tetrahexyldecyl ascorbate form remains gentle and non-irritating. However, if you're completely new to vitamin C, you may wish to start with the original C-Tetra (7%) and progress to Luxe once your skin has adapted. Speak to our skincare experts for personalised guidance.

Q: Should I use this in the morning or evening?
A: C-Tetra® Luxe should be applied in the morning as part of your daytime routine. Vitamin C provides antioxidant protection against environmental aggressors encountered throughout the day. Always follow with broad-spectrum SPF. This aligns with Medik8's CSA Philosophy: vitamin C plus sunscreen by day, vitamin A by night.

Q: Can I use C-Tetra® Luxe with other serums in my routine?
A: Yes, C-Tetra® Luxe layers well with other serums. As an oil-based formulation, apply it first after cleansing, followed by any water-based or emulsion serums. It works particularly well alongside Medik8's Clarity Peptides. Always finish your morning routine with sunscreen for optimal protection.