Intensively brighten dark spots and uneven tone with COSRX The Vitamin C 23 Serum. This concentrated Korean antioxidant treatment contains 23% pure vitamin C to improve radiance, soften the look of pigmentation and support collagen against environmental stress. Designed for experienced vitamin-C users who want a high-strength serum.

After cleansing and toner, apply a small amount to clean, dry skin, avoiding eyes and damaged areas. Start two or three evenings weekly and increase as tolerated. Follow with moisturizer and use SPF every morning. Store tightly closed in the refrigerator after opening and use promptly.

Key ingredients: 23% pure ascorbic acid (vitamin C), tocotrienol (super vitamin E), hyaluronic acid, allantoin and moisturizing humectants.