COSRX

Advanced The Vitamin C 23 Serum

Name: Advanced The Vitamin C 23 Serum
Brand: COSRX
Price: 26.0 USD
Availability: InStock
Rating: 4.8 (10 reviews)

For experienced vitamin C and dark spot correction

The "High-Octane" Glow Injection

COSRX The Vitamin C 23 Serum is a concentrated powerhouse featuring a massive 23% Pure Vitamin C (Ascorbic Acid). This clinical-grade formula is designed to aggressively target hyperpigmentation, "de-yellow" a dull complexion, and boost collagen production. It uses a specialized biphasic oil layer to keep the Vitamin C stable and fresh until the very last drop.

Why it’s a Real Gem: It’s "Brightening in Overdrive." It hits the Skin Clinic mark by delivering a level of potency usually reserved for professional treatments. It solves the problem of "stubborn" dark spots by physically fading them in as little as 4 weeks, leaving behind a luminous, high-gloss finish that looks like you’ve been professionally "lit."

Best For: Rescuing "Sun-Damaged" or tired skin. The ultimate choice for those who are serious about deleting dark spots and achieving maximum radiance in record time.

Key Ingredients

23% Pure Vitamin C (L-Ascorbic Acid) A high-potency, pharmaceutical-grade concentration that inhibits melanin production to help fade dark spots and hyperpigmentation within 4 weeks. Tocotrienol (Super Vitamin E) A rare form of vitamin E that is up to 50 times more effective than standard tocopherol, providing a massive antioxidant shield to prevent premature ageing. Sodium Hyaluronate A skin-identical hydrator that pulls moisture into the deeper layers of the dermis to ensure structural hydration while the vitamin C works. Allantoin and Caffeine A dual-action blend that calms potential tingling from the high-strength vitamin C while de-puffing the skin for a smoother texture.

How to Use

Shake well before use to mix the oil and water layers. Apply 2–3 drops to clean, dry skin. You may feel a slight "prickle"—this is normal for a 23% concentration. Store in the refrigerator after opening to prevent the Vitamin C from turning brown (oxidizing). When: AM is best (to fight daily pollution), but always follow with SPF 50+. Can also be used in the PM. Actives tip: This is a "powerhouse" serum. To get the absolute best results without irritation, apply the COSRX 6 Peptide Skin Booster first. The peptides act as a "primer" that helps this high-strength Vitamin C absorb 132% more effectively while the cooling effect of the booster keeps your skin calm.

Full Ingredients

Aqua/Water, Ascorbic Acid(23%), Butylene Glycol, Dimethicone, Panthenol, 3-O-Ethyl Ascorbic Acid, Squalane, Sodium Hydroxide, Caffeine, Sodium Hyaluronate, Sodium Metaphosphate, Adenosine, Acetyl Glucosamine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Tocotrienols, Tocopherol, Elaeis Guineensis (Palm) Oil, Arginine, Niacinamide, Pentylene Glycol, Glutathione, Helianthus Annuus (Sunflower) Seed Oil, Methyl Trimethicone, Carthamus Tinctorius (Safflower) Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa (Carrot) Root Extract, Glycyrrhiza Glabra (Licorice) Root Extract, Beta-Carotene

Volume — 20 ml