COSRX

The Niacinamide 15 Serum

Name: The Niacinamide 15 Serum
Brand: COSRX
Price: 25.0 USD
Availability: InStock

For clarity and pore control

The "High-Strength" Clarity Shot

COSRX The Niacinamide 15 Serum is a potent, clinical-grade solution for total complexion control. Featuring a massive 15% Niacinamide combined with Zinc PCA and Allantoin, it’s a high-performance formula designed to suppress sebum, shrink the appearance of large pores, and fade stubborn post-inflammatory hyperpigmentation (PIH) with surgical precision.

Why it’s a Real Gem: It’s "The Pore-Specialist." It hits the Pro-Filter mark by aggressively smoothing out skin texture and "de-greasing" the T-zone without drying out the skin. It’s a Popular, but Proven powerhouse that doesn't just treat current breakouts; it actually prevents future ones by balancing oil production at the source, leaving you with a clear, high-definition finish.

Best For: Deleting the "Breakout Reminders." Perfect for oily and acne-prone skin types who are serious about fading dark spots and achieving a smooth, poreless "glass skin" look.

Key Ingredients

15% Niacinamide (Vitamin B3) A high-intensity concentration that provides total acne care by regulating sebum, soothing inflammation, and physically diminishing post-acne scars for Blemish Control. N-Acetylglucosamine (NAG) A skin-identical ingredient that works in synergy with niacinamide to effectively fade hyperpigmentation and physically support Texture Refinement. 1% Zinc PCA A specialized mineral complex that inhibits inflammation and balances oil-to-water levels to prevent new breakouts and support Barrier Repair. Allantoin A soothing botanical extract that facilitates skin regeneration and supports collagen synthesis for a calm and Healthy Complexion.

How to Use

After cleansing and toning, apply 2–3 drops to the face. Focus on problem areas like the T-zone or active breakout zones. Gently pat into the skin until fully absorbed before applying moisturizer. When: AM & PM (Start once a day if you have sensitive skin to build tolerance). Actives tip: This serum contains Acetyl Glucosamine, which is the "secret sauce" for Niacinamide. These two ingredients are chemically proven to work better together to delete dark spots than Niacinamide alone. For the ultimate "glass skin" routine, layer this over the COSRX 6 Peptide Skin Booster to help the high-strength 15% Niacinamide absorb deeper with zero irritation.

Full Ingredients

Water, Pentylene Glycol, Niacinamide(15%), Butylene Glycol, Acetyl Glucosamine, 1,2-Hexanediol, Zinc PCA, Trehalose, Xanthan Gum, Pullulan, Allantoin, Ethylhexylglycerin, Sodium Phytate, Citric Acid, Tocopherol

Volume — 20 ml