COSRX The Vitamin C 23 Serum: A highly concentrated serum containing 23% pure vitamin C (L-ascorbic acid).
COSRX The Vitamin C 13 Serum: A gentler, water-based serum with 13% pure vitamin C, suitable for daily use and sensitive skin.
Common Ingredients: Both products feature Super Vitamin E (tocotrienol) to stabilize the vitamin C and provide stronger antioxidant protection, along with hyaluronic acid for hydration.
Benefits: They are designed to brighten skin tone, reduce dark spots and hyperpigmentation, improve skin condition, and boost collagen production