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COSRX The Vitamin C 23 Serum 20g



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The Vitamin C 23 Serum

  • Firms And Plumps
  • Brightens Dull Skin
  • Diminishes Finelines And Wrinkles
  • Fade Acne Scars And Hyperpigmentation

Hypoallergenic 23% pure vitamin C

Antioxidant brightening booster with high performance for preventing early signs of anti-aging


Dull skin

Uneven skintone

Early signs of aging

Dark spots and hyperpigmentation

Clinical Results in 4 Weeks 

16.26% improvement of pigmentation (visible melasma and blemishes) 
32.89% improvement of triple-complexion skin tone (red skin tone) 
32.36% effect of brightening (skin radiance) 
16.36% improvement of elasticity (internal elasticity) 
38.65% improvement of the pore (volume) 
27.18% improvement of the pore (count) 
4.18% improvement of skin age 

Based on clinical trials of 20 subjects. 

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Water, Ascorbic Acid(23%), Propanediol, Dimethicone, Tromethamine, Panthenol, Ethyl Ascorbyl Ether, Squalane, Caffeine, Sodium Chloride, Sodium Hyaluronate, Sodium Sulfite, Disodium EDTA, Glutathione, Adenosine, Acetyl Glucosamine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Tocotrienols, Tocopherol, Elaeis Guineensis (Palm) Oil, Butylene Glycol, Arginine, Niacinamide, Pentylene Glycol, Alcohol Denat., Helianthus Annuus (Sunflower) Seed Oil, Glycyrrhiza Glabra (Licorice) Root Extract, Methyl Trimethicone, Carthamus Tinctorius (Safflower) Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa (Carrot) Root Extract, Beta-Carotene.


After cleansing, during the serum phase, shake the bottle lightly once or twice from side to side and apply a few drops to the skin. Use fingertips to gently massage and absorb the serum, starting from the inside of the face working towards the edges.

Keep Refrigerated (3~10°C)

Please use immediately after purchase and store upright in refrigerator once opened. 

For the first use, attach the enclosed dropper in the product package.

Recommended to use within 2 months of opening due to active ingredient protection. 

Highly concentrated serum should only be used in the evening? NO! This serum can be used in the morning and/or afternoon.

If applied in the morning, be sure to use with a SPF of 30 or higher.