Defend against the visible effects of premature skin aging and achieve accelerated skin brightening with a next-generation combination of 20% Vitamin C and Phyto Exosomes. Clinically proven to brighten skin and visibly improve wrinkles in 7 days* C-Tetra Advanced is engineered for visible brightening, skin smoothing, and daily antioxidant defense. Delivered in a non-greasy, lightweight gel-serum, this intelligent ingredient complex combines potent, stabilized, 20% Vitamin C with restorative Phyto Exosomes for deep, controlled delivery, and omni-antioxidant acetyl zingerone to help neutralize the aging effects of free radicals. The results? A high-performance, fast-absorbing serum that effortlessly sinks into the skin, layering perfectly in your skincare regimen as well as under makeup.