COSRX The Vitamin C 23 Serum is a high-potency brightening serum formulated with 23% pure Vitamin C (L-Ascorbic Acid) to visibly improve skin tone, fade dark spots, and enhance overall radiance. This lightweight yet powerful formula targets pigmentation, acne marks, uneven texture, and early signs of aging while boosting skin clarity. Stabilized with Vitamin E and Hyaluronic Acid, it nourishes the skin and delivers a smoother, more luminous complexion with consistent use.

Benefits

• Brightens dull skin and gives a more radiant complexion

• Fades hyperpigmentation, dark spots, and post-acne marks

• Evens out skin tone and texture

• Helps reduce the appearance of fine lines and early aging

• Antioxidant protection against free-radical damage

• Hydrates and nourishes the skin without feeling greasy

• Improves overall skin smoothness and glow

Directions to Use

After cleansing and toning, apply 2–3 drops of the serum to your face. Gently massage until fully absorbed. Use in the evening for best results. If using during the day, follow up with a broad-spectrum sunscreen (SPF 30 or above).

Tip: If you are new to Vitamin C, start by using 2–3 times a week and gradually increase frequency.

Store in a cool, dry place and keep away from direct sunlight.

Main Ingredient

L-Ascorbic Acid (23%): A pure and potent form of Vitamin C known for its strong brightening effects. It helps fade pigmentation, boosts collagen production, improves skin radiance, and protects against environmental damage. High-strength L-Ascorbic Acid delivers fast and visible improvements in clarity and dark spots.

Full Ingredient 

Water, Ascorbic Acid (23%), Butylene Glycol, Propanediol, 1,2-Hexanediol, Methyl Trimethicone, Squalane, Polyglyceryl-10 Myristate, Polyglyceryl-10 Laurate, Hydroxyethylcellulose, Arginine, Ethylhexylglycerin, Tocopherol (Vitamin E), Sodium Hyaluronate, Allantoin, Adenosine.