COSRX Advanced The Vitamin C 23 Serum

A high-potency serum built on 23% pure ascorbic acid plus 3-O-ethyl ascorbic acid, formulated to visibly fade dark spots, refine texture, and boost radiance. This is a fast-absorbing, professional-strength formula — because of its high concentration, it's best introduced gradually and is not recommended for first-time vitamin C users or highly reactive skin.Key Benefits: High-strength 23% ascorbic acid targets dark spots and uneven tone Refines the look of texture and dullness Fast-absorbing, lightweight serum texture Antioxidant support from vitamin E and glutathione Best for vitamin-C-experienced users seeking visible brightening results