Boost your skincare routine with Cosrx The Vitamin C 23 Serum, formulated with 23% pure Vitamin C to brighten, firm, and reduce early signs of aging. This potent antioxidant serum helps fade dark spots, acne scars, and hyperpigmentation while improving skin tone and elasticity. Within just 4 weeks, users saw visible improvements in skin radiance, pore size, and fine lines. Ideal for dull, uneven skin, and signs of aging.