Medik8 C-Tetra® Advanced helps defend against premature skin ageing and achieve accelerated skin brightening. With a next-generation combination of 20% vitamin C and cutting edge phyto exosomes that help shield and improve the skin's recovery from exposure to environmental stressors which can cause premature ageing. Clinically proven to brighten skin and visibly improve wrinkles in 7 days with 0% barrier disruption, C-Tetra Advanced is engineered for high-performance visible brightening, skin smoothing, and daily antioxidant defence. This intelligent ingredient complex combines potent, stabilised 20% vitamin C with restorative phyto exosomes and omni-antioxidant acetyl zingerone to neutralise the ageing effects of free radicals. The result? A high-performance, age-defying vitamin C serum that works smarter, not harsher.

 

How to use Medik8 C-Tetra® Advanced

1. Apply as part of your morning skincare routine. 

2. Massage 2-3 pumps across the face, neck and décolletage. 

3. Follow with moisturiser and always finish with sunscreen. 

Key Benefits

• Dramatic Skin Brightening: Clinically proven to visibly brighten skin and even tone in 7 days for a radiant, luminous complexion.
• Premature Skin Ageing Defence: Shields skin from damaging free radicals, pollution, and daily environmental stressors to help defend against premature skin ageing.
• Skin Barrier Support & Enhanced Resilience: Powerful phyto exosomes work to reinforce the skin’s natural defence system, deliver replenishing bioactives to skin cells rapidly & effectively, ensuring 0% barrier disruption.
• Smooth and Even Complexion: Clinically proven to visibly improve skin smoothness and texture in 7 days, leaving a soft, polished finish.
• Lightweight Finish: The fast-absorbing gel-serum texture hydrates, smooths, and primes, leaving skin instantly refreshed and ready for the day ahead.

• CLINICALLY PROVEN
• ARTIFICIAL FRAGRANCE FREE
• DERMATOLOGICALLY TESTED
• PROVEN GENTLE FORMULA
• CERTIFIED BY THE VEGAN SOCIETY
• NON-COMEDOGENIC
• TESTED ON ALL SKIN TYPES AND TONES

Key Ingredients

20% Stabilised Vitamin C (Tetrahexyldecyl Ascorbate): A highly potent yet gentle form of vitamin C for dramatic skin brightening and powerful antioxidant protection against premature skin ageing.
Phyto Exosomes: Encapsulated by nature, our phyto exosomes intelligently deliver proteins, lipids, and messenger molecules to skin cells. Together, alongside our supercharged vitamin C, they help prevent & reduce premature skin ageing by supporting healthier-looking, more resilient skin.
Acetyl Zingerone: A super-antioxidant that works synergistically with vitamin C, enhancing its efficacy while neutralising ageing free radicals and shielding skin from environmental stressors.
Multi-Weight Hyaluronic Acid: Draws moisture into the skin to instantly plump and deeply hydrate for a soft, supple complexion.
N-Acetyl Glucosamine (NAG): A barrier-supporting, gentle, skin-refiner that smooths the look of pores while helping to increase the skin’s own natural hyaluronic acid levels over time.