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 for deep, controlled delivery 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 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.  INGREDIENTS C-Tetra Advanced 20% Vitamin C Gel-Serum With Phyto Exosomes C-Tetra® Advanced20% Vitamin C Gel-Serum With Phyto Exosomes