COSRX Advanced The Vitamin C 23 Serum is a highly concentrated serum, ideal for dull, uneven skin, pigmentation spots, or visible signs of skin aging. Formulated with a 23 % concentration of pure vitamin C, niacinamide, glutathione, vitamin E, panthenol, squalane, and hyaluronic acid, it effectively helps to even out skin tone, reduce the appearance of hyperpigmentation, and restore natural radiance. The formula is enhanced with moisturizing and antioxidant ingredients such as adenosine, caffeine, allantoin, and botanical extracts, which support a firmer, smoother, and revitalized complexion. The freshness and stability of the active ingredients are ensured by the two-phase formula structure (water- and oil-based) as well as the special packaging with an opaque container and a separately packaged dropper, which limits vitamin C’s exposure to light, air, and heat. The lightweight texture applies easily and is an excellent choice for routines focused on radiance, firmness, and antioxidant care. Benefits: Helps to even out skin tone. Reduces the visibility of pigmentation spots. Restores radiance to the skin and combats a dull appearance. Supports skin firmness and elasticity. Helps improve the appearance of fine lines. Provides antioxidant protection against external influences. Hydrates and keeps skin supple and more comfortable. Helps refine the appearance of pores and smooths texture. Leaves the complexion more radiant, even, and revitalized. Special packaging with an opaque container and a separately packaged dropper.