COSRX The Vitamin C 13 Serum

The COSRX The Vitamin C 13 Serum is a high-performance brightening elixir formulated with 13% pure vitamin C (ascorbic acid) to visibly fade dark spots and discoloration. Enhanced with niacinamide, glutathione, and sodium hyaluronate, it works to improve skin clarity, smooth rough texture, and lock in hydration. The silky, fast-absorbing texture layers seamlessly into any skincare routine—morning or night—and doubles as a stabilizing base for antioxidant protection. Perfect for dull, uneven, or aging skin seeking a natural glow.

The COSRX The Vitamin C 13 Serum is formulated with a blend of ingredients designed to brighten, hydrate, and protect the skin. Here is the full ingredient list:

Ingredients: Water, Ascorbic Acid (13%), Butylene Glycol, Dipropylene Glycol, Tromethamine, 3-O-Ethyl Ascorbic Acid, Panthenol, Acetyl Glucosamine, Caffeine, Sodium Hyaluronate, Sodium Sulfite, Disodium EDTA, Glutathione, Adenosine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Squalane, Tocotrienols, Tocopherol, Elaeis Guineensis (Palm) Oil, Arginine, Niacinamide, Pentylene Glycol, Glycyrrhiza Glabra (Licorice) Root 1 Extract.  

Please note that ingredient lists may change or vary over time. For the most accurate and up-to-date information, refer to the product packaging or the manufacturer's official website.