Medik8 
EU C-Tetra Advanced

Defend against premature skin ageing and achieve accelerated skin brightening with a next-generation combination of 20% vitamin C and skin barrier science.
 
Clinically proven to brighten skin and visibly improve wrinkles in 7 days [1] with 0% barrier disruption [1], 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 for deep, controlled delivery, and omni-antioxidant acetyl zingerone to neutralise the ageing effects of free radicals.

- Dramatic Skin Brightening: Clinically proven to visibly brighten skin and even tone in 7 days for a radiant, luminous complexion. [1]
- Enhanced Skin Barrier Support: Powerful phyto exosomes deliver replenishing bioactives to skin cells rapidly & effectively, ensuring 0% barrier disruption. [1]
- Premature Skin Ageing Defence: Shields skin from damaging free radicals, pollution, and daily environmental stressors to help defend against premature skin ageing.
- Smooth & Even Complexion: Clinically proven to visibly improve skin smoothness and texture in 7 days, leaving a soft, polished finish. [1]
- Lightweight Finish: The fast-absorbing gel-serum texture hydrates, smooths, and primes leaving skin instantly refreshed and ready for the day ahead.
 
Proven Results:
7 days to visibly brighter skin [1]
7 days to visibly reduced wrinkles [1]
0% barrier disruption [1]
7 days to visibly smoother skin texture [1]
90% reduction of pollution damage to the skin’s surface [2]
 
[1] Proven via independent clinical study conducted over 4 weeks on 32 participants.
[2] Proven via in vitro protein carbonylation data against particulate matter pollution on the stratum corneum and epidermis.

Apply as part of your morning skincare routine.

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

Follow with moisturiser and always finish with sunscreen.