Cosrx Vitamin C 23 Serum

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COSRX Vitamin C 23 Serum is 23% pure L-ascorbic acid, stabilised — which is the difficult part. Most high-percentage Vitamin C stings and oxidises; this one uses a double-layer structure with an oil layer on top to delay oxidation, and tocotrienol to amplify the effect. Hypoallergenic and fragrance-free.

🎯 What It Does

• Fades acne scars — blocks melanin synthesis triggered by UV exposure
• Brightens dull skin — restores radiance to uneven, tired complexions
• Targets hyperpigmentation — works on dark spots and post-inflammatory marks
• Softens early ageing — promotes collagen synthesis, improving fine lines and elasticity
• Defends against damage — a potent antioxidant that neutralises free radicals
• Stays stable and tolerable — stabilised formula that avoids the sting of raw Vitamin C

🔬 Key Ingredients

• Ascorbic Acid 23% — pure Vitamin C at high concentration
• Tocotrienol — super Vitamin E, with up to 50 times the antioxidant effect of tocopherol; works synergistically with Vitamin C
• Sodium Hyaluronate — maintains hydration and stabilises skin structure
• Allantoin — soothes and relieves irritation
• Glutathione & Niacinamide — additional brightening support

📋 How to Use

1. Attach the enclosed dropper before first use.
2. After cleansing, shake the bottle lightly once or twice from side to side.
3. Apply a few drops and massage gently from the centre of the face outwards.
4. Can be used morning or evening. If used in the morning, always follow with SPF 30 or higher.

Use within 2 months of opening — pure Vitamin C degrades once exposed to air, and the active content drops after that. Contains denatured alcohol.

👤 Best For

Skin Type: Normal, Dry, Dull — not for very sensitive skin
Concerns: Acne Scars, Hyperpigmentation, Dullness, Fine Lines, Uneven Tone
Texture: Concentrated serum with oil top layer

📊 At a Glance