COSRX vitamin C serum with 13% pure ascorbic acid to brighten skin tone, boost radiance, and support antioxidant protection. A daily brightening serum formulated with 13% pure vitamin C to visibly improve skin tone and radiance. This lightweight serum helps reduce dullness, dark spots, and uneven texture while delivering antioxidant protection. Infused with vitamin E and hyaluronic acid, it enhances glow while supporting hydration and skin comfort. Suitable for beginners to vitamin C, it absorbs smoothly and leaves skin looking fresh and luminous.