COSRX

The Vitamin C 23 Serum 20ml

£20.00 GBP
Shipping calculated at checkout.
SIZE: 20ml

Skin Type: All skin types, especially dull, uneven, or aging skin
Texture: Dual-layer oil-serum with a lightweight, smooth finish
Key Functions: Brightening, anti-aging, antioxidant defense, hydration
Free From: Parabens, sulfates, artificial fragrance
Dermatologist-Tested | Clinically Proven | Non-Sticky Finish | High-Potency Formula

A high-strength antioxidant serum formulated with 23% pure Vitamin C (Ascorbic Acid) to help fade hyperpigmentation, brighten uneven tone, and restore radiance. Enriched with Super Vitamin E (Tocotrienol) and Hyaluronic Acid, it protects against oxidative stress while keeping the skin hydrated, plump, and smooth.

The formula’s unique two-layer structure—an oil layer that prevents oxidation and a serum layer that absorbs quickly and delivers potent results without irritation. Allantoin provides additional soothing benefits, making it suitable even for those sensitive to high concentrations of Vitamin C.

Key Benefits

  • Brightens and revitalises dull skin: 23% pure Vitamin C fades dark spots and discoloration

  • Improves skin elasticity and smooths texture: Helps reduce fine lines and wrinkles

  • Deep hydration: Hyaluronic Acid locks in moisture for a plumper appearance

  • Soothes sensitivity: Allantoin calms and comforts irritated skin

  • Antioxidant protection: Super Vitamin E defends against environmental stressors

Key Ingredients

  • Ascorbic Acid (23%): Fades pigmentation, evens tone, boosts collagen production

  • Tocotrienol (Super Vitamin E): 50x stronger antioxidant than Tocopherol

  • Sodium Hyaluronate: Hydrates and plumps without heaviness

  • Allantoin: Soothes skin and reduces potential irritation

How to use
  • Apply during the serum step of your skincare routine, on clean, dry skin.
  • Gently pat across the face, avoiding the eye area. For daytime use, always follow with sunscreen.
  • If separation occurs, lightly shake the bottle side to side before opening to mix the oil and serum layers.

Store upright with the dropper secured tightly.

FAQ
Ingredients

Water, Ascorbic Acid, 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, Tocotrienol, Tocopherol, Elaeis Guineensis (Palm) Oil, Butylene Glycol, Arginine, Niacinamide, Pentylene Glycol, Alcohol Denat., Helianthus Annuus (Sunflower) Seed Oil, Glycyrrhiza Glabra (Licorice) Extract, Methyl Trimethicone, Carthamus Tinctorius (Safflower) Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa (Carrot) Root Extract, Beta-Carotene.

Shipping

Processing Time: 1–2 business days

Estimated Delivery:

  • Standard: 2–3 weeks
  • Express: 3–5 business days

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Returns

Return Window: Within 14 days of delivery

Condition: Unused, unopened, and in original packaging

Report issues (damaged or incorrect items) within 7 days of receipt

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