COSRX The Vitamin C 23 Serum is a potent skincare treatment featuring 23% pure Vitamin C, Super Vitamin E, and Hyaluronic Acid. This powerful combination helps fade acne scars, brighten dull skin, improve skin tone, and reduce the appearance of fine lines and wrinkles. Key features: • Contains 23% pure Vitamin C (Ascorbic Acid) • Enriched with Super Vitamin E and Hyaluronic Acid • Helps fade acne scars and hyperpigmentation • Brightens and evens skin tone • Reduces appearance of fine lines and wrinkles • Provides antioxidant protection Clinical trials over 4 weeks showed significant improvements in multiple skin concerns: 16.26% reduction in pigmentation, 32.89% improvement in red skin tone, 32.36% increase in skin radiance, and 38.65% reduction in pore volume. The serum should be applied after cleansing and toning, using 2-3 drops gently massaged into the skin from the inside of the face outward.