COSRX The Niacinamide 15 Serum 20ml

Name: COSRX The Niacinamide 15 Serum 20ml
Brand: COSRX
SKU: COSRX-N15S-20ML
Price: 20.99 USD
Availability: InStock

$20.99

Diminish persistent breakouts and tighten enlarged pores with the COSRX The Niacinamide 15 Serum 20ml. Engineered for oily, combination, and acne-prone complexions battling excess sebum and uneven skin tone, this high-potency Korean skincare formula utilizes a maximum 15% concentration of Niacinamide to restore total skin clarity.

Unlike standard low-dose serums, this advanced oil-control treatment features a synergistic blend of Niacinamide and Zinc PCA. It harmonizes with your skin’s natural lipid profile to reduce inflammation, fade stubborn acne scars, and smooth out rough textures. The result is a non-greasy, clear glass skin finish that balances moisture while preventing future blemishes from forming.

Target Concerns

Enlarged Pores, Excess Sebum Production, Active Acne Breakouts, and Post-Inflammatory Hyperpigmentation

Skin Compatibility

Oily, combination, and acne-prone skin types—expertly calibrated for complexions requiring intensive, non-comedogenic blemish and pore control

Texture & Finish

A lightweight, highly fluid liquid serum that glides smoothly and absorbs rapidly, leaving a refreshed, matte-yet-hydrated baseline

Key Ingredients

Niacinamide (15%), Zinc PCA (1%), Acetyl Glucosamine, and Allantoin

Free Shipping

Over $69 Tracked

100% Authentic

Brand Partnership

Direct From KR

Fresh Stock Only

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COSRX The Niacinamide 15 Serum 20ml is a professional-grade acne and pore treatment formulated with a high-potency 15% concentration of Niacinamide. This dermatologist-tested serum acts as a total care solution to fundamentally control excess sebum production, tighten stretched pores, and smooth rough epidermal textures.

The lightweight, fast-absorbing liquid formula is specifically optimized for oily and breakout-prone skin types. Infused with 1% Zinc PCA, it effectively diminishes skin inflammation and targets active blemishes while creating a defensive barrier to prevent future flare-ups, ensuring a fresh and balanced look.

Additionally, the combination of Acetyl Glucosamine and Allantoin works synergistically to fade stubborn dark spots, acne scars, and hyperpigmentation while soothing irritation. Whether you are managing chronic daytime oiliness or post-acne marks, this solution provides the essential baseline for a clear, healthy, and uniformly radiant skin structure.

• Texture: Lightweight, fast-absorbing watery liquid serum with a fresh finish
• Skin Type: Oily, combination, and acne-prone skin barriers
• Best For: Enlarged pores, active breakouts, excess sebum, and dark spots
• Key Benefit: 15% Niacinamide + Zinc PCA for optimal sebum regulation and blemish recovery
• Volume: 20ml / 0.67 fl.oz.
• Origin: South Korea

• Controls excessive sebum production and balances oil-to-water levels with 15% Niacinamide.
• Minimizes the appearance of enlarged, stretched pores for a smoother skin texture.
• Reduces active breakouts, blemishes, and skin inflammation using 1% Zinc PCA.
• Fades post-acne dark spots, hyperpigmentation, and scars to promote a uniform complexion.
• Features a lightweight, non-comedogenic formula that won't clog pores or feel sticky.
• Dermatologically tested to ensure maximum safety and efficacy on acne-prone skin.

— Key Ingredients —
• Niacinamide (15%): A multi-functional active that regulates sebum, tightens pores, calms acne breakouts, and brightens hyperpigmentation.
• Zinc PCA (1%): A powerful anti-inflammatory agent that controls excess oil production and accelerates the recovery of troubled skin.
• Acetyl Glucosamine: A gentle exfoliating compound that works with Niacinamide to fade dark spots and acne scars effectively.
• Allantoin: A botanical soothing agent that relieves environmental redness, calms irritation, and protects the skin barrier.

— Full List —
Water, Niacinamide, Pentylene Glycol, Zinc PCA, Chondrus Crispus Extract, Saccharum Officinarum (Sugarcane) Extract, Adenosine, Polyacrylate Crosspolymer-6, Coceth-7, PPG-1-PEG-9 Lauryl Glycol Ether, PEG-40 Hydrogenated Castor Oil, Allantoin, Caffeine, Xanthan Gum, Acetyl Glucosamine, Disodium EDTA

• Step 1: After cleansing and applying your preferred toner, dispense 2-3 drops of the serum onto your fingertips.
• Step 2: Smooth the formula gently across your face, working outward from the center while avoiding the immediate eye area.
• Step 3: Gently pat with your fingers to ensure the high-potency ingredients fully absorb into the pores.
• Step 4: Focus an extra drop directly onto problem areas experiencing heavy sebum production, enlarged pores, or dark spots.
• Step 5: Follow with a lightweight, non-comedogenic moisturizer to lock in the treatment and secure a smooth finish.

FAQs

Authenticity is our top priority. All items are sourced exclusively from highly trusted, authorized supply chains and official distributors in South Korea. We strictly verify, carefully inspect, and securely package every single product to guarantee 100% authenticity and optimal freshness before it leaves our facility.

We ship worldwide directly from our fulfillment operations in South Korea. We offer a flat rate of $6.99 for orders under $69, and provide 100% Free Shipping for orders $69 and above. Delivery typically takes 7–14 business days, depending on your local customs clearance and location.

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You can request a cancellation within 24 hours of placement, provided the order has not yet been processed for shipping. For returns, we accept items within 7 days of delivery, provided they are completely unopened, unused, and in their original packaging. Please note that for all returns, the customer is responsible for all associated costs, including original shipping, return shipping, and any customs clearance fees. Contact our support team at info@seoul-luma.com with your order number to initiate the process.

Yes, absolutely. Once your package is dispatched from our global fulfillment center, an automated shipping confirmation email containing your tracking number and a tracking link will be sent to you immediately. You will be able to monitor your package's journey in real-time from South Korea straight to your doorstep.