Cosrx The Niacinamide 15 Serum 20 ml

COSRX The Niacinamide 15 Serum 20ml | Premium 15% High-Concentration Niacinamide, Zinc PCA & BHA Pore & Blemish Refining Serum | 100% Original Made in Korea

Product Overview & Benefits

Managing active acne, stubborn post-breakout dark marks, and persistent T-zone shine under a warm, high-humidity tropical climate like Bangladesh requires targeted sebum-regulating and pore-clarifying care. High ambient temperatures accelerate oil production, which traps dead keratin cells inside pore tracks, leading to blackheads, whiteheads, and inflamed blemishes. COSRX The Niacinamide 15 Serum addresses these core skin concerns by delivering a maximum-strength 15% Niacinamide formula paired with oil-controlling Zinc PCA.

What elevates this total blemish treatment to an elite clinical status is its bio-available 15% Niacinamide & Pore-Clarifying Architecture:

1. 15% High-Purity Niacinamide (Vitamin B3): A maximum clinical concentration that inhibits melanin transfer to surface cells, rapidly fades post-acne dark marks, tightens enlarged pore boundaries, and strengthens barrier integrity.
2. Zinc PCA (1%): A synergistic mineral compound that regulates overactive oil pathways, reduces acne-causing bacterial activity, and soothes localized blemish inflammation.
3. Salicylic Acid (BHA) & N-Acetylglucosamine (NAG): Gentle exfoliants that dissolve trapped sebum plugs deep within pore channels while working alongside Niacinamide to smooth micro-roughness and erase hyperpigmentation.

Supported by Allantoin and Trehalose, this non-comedogenic liquid serum floods tissue tracks with fluid hydration to prevent skin irritation. It absorbs cleanly into the skin without leaving a sticky, heavy, or tacky film.

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Skin Type Suitability

• Acne-Prone & Blemish-Troubled Skins: 15% Niacinamide and Zinc PCA target active breakouts, soothe inflammation, and clear acne pathways.
• Oily & Combination Profiles: Regulates excess midday sebum production and controls T-zone shine.
• Enlarged Pores & Clogged Track Profiles: BHA and NAG dissolve oxidized sebum plugs and tighten stretched pore walls.
• Hyperpigmented & Post-Acne Mark Skins: Lightens post-inflammatory hyperpigmentation (PIH/PIE) and unifies skin tone boundaries.

Who Is This Product For

• Ideal for individuals seeking a clinical-strength Korean serum to target active acne, enlarged pores, and post-breakout dark marks.
• Perfect for skincare buyers looking for a fast-absorbing, non-sticky oil-control serum suited for hot and humid weather.
• Highly recommended for users dealing with persistent T-zone shine, congested pores, or uneven skin micro-texture.
• Excellent for anyone wanting an authentic, laboratory-tested Korean serum to achieve a clear, smooth glass-skin base.

Who Should Avoid This Product

• Avoid using this product if you have a documented clinical allergy to Niacinamide (Vitamin B3), Zinc derivatives, Salicylic Acid (Aspirin sensitivity), or specific raw components listed in the ingredients.
• Do not apply the serum directly across open bleeding cuts, severe weeping eczema flares, or raw unhealed skin lesions.

What Skin Concerns Does It Help Address

• Active Breakouts & Inflammation: Zinc PCA and Niacinamide calm blemish redness and reduce acne severity.
• Post-Acne Dark Spots (PIH/PIE): High-potency Niacinamide blocks melanin transfer to fade dark post-breakout marks.
• Enlarged & Stretched Pores: BHA clears trapped sebum and refines pore boundaries.
• Excess Midday Sebum: Regulates oil production across the nose, forehead, and chin.
• Rough Surface Micro-Texture: NAG gently smooths skin texture for a soft, touchable finish.

Expected Skincare Results Timeline

• Immediate (First Application): Surface oiliness and post-cleansing shine vanish. Skin feels fresh, hydrated, and smooth with zero sticky film.
• Within 14 Days: Active blemish redness cools down, T-zone oiliness stays balanced, and post-acne marks begin to lighten.
• After 4 Weeks: Enlarged pores appear visibly refined, overall skin micro-texture feels smoother, and dark marks show noticeable fading for a clear glass-skin balance.

Note: Results are not guaranteed and may vary depending on skin type, barrier condition, environmental factors, and consistency of use.

How To Use

Using your high-concentration Niacinamide serum correctly ensures maximum active absorption and barrier safety.

Step-by-Step Application

1. Cleanse your face thoroughly using a gentle, barrier-friendly wash.
2. Apply your daily hydrating toner and allow it to fully absorb into the skin.
3. Dispense 2 to 3 drops of COSRX The Niacinamide 15 Serum directly onto clean fingertips or cheeks.
4. Smooth evenly across your face and neck, focusing on areas with active blemishes, enlarged pores, or dark marks.
5. Gently pat until fully absorbed into skin pathways.
6. Follow with moisturizer and mandatory broad-spectrum sunscreen during daytime routines.

Daily Skincare Pro-Tip & High-Concentration Guidance

• Gradual Introduction: If you are new to high concentrations of Niacinamide (15%), patch test behind your ear first or start by applying once daily (or every other day) before moving to twice-daily application.
• Mandatory Daytime Sunscreen: To protect clearing skin and prevent post-acne dark marks from recurring, always apply a broad-spectrum sunscreen (SPF 30 or higher) every morning during use.

Ingredient Breakdown

• Niacinamide (15% Vitamin B3): Maximum-strength active that fades hyperpigmentation, tightens pores, regulates sebum, and strengthens the skin barrier.
• Zinc PCA (1%): Essential mineral active that controls oil production, soothes blemish inflammation, and supports acne recovery.
• Salicylic Acid (BHA): Oil-soluble exfoliant that dissolves trapped sebum and dead cells inside pore tracks.
• Acetyl Glucosamine (NAG): Works synergistically with Niacinamide to reduce dark marks and smooth skin texture.
• Allantoin & Trehalose: Soothe surface sensitivity, protect delicate skin tissue, and maintain hydration balance.

About COSRX

COSRX is an internationally acclaimed South Korean dermo-cosmetic brand celebrated globally for formulating minimalist, result-oriented skincare backed by scientific testing. Renowned for flagship lines like Snail Mucin, Centella, and The RX Vitamin & Niacinamide Serums, COSRX delivers high-efficacy, hypoallergenic products designed to soothe, protect, and restore skin health.

• Country of Origin: South Korea

Authenticity & Quality Assurance

When purchasing imported Korean skincare and active treatments, verifying absolute product authenticity is essential to protect your skin barrier and ensure reliable results.

We source our products from trusted and reliable sources to ensure authenticity, quality, and customer confidence.

At thealoy.com, every item in our selection undergoes strict quality checks through a secure supply chain to guarantee its true origin. Whether you are searching for an authentic skincare shop in Bangladesh, purchasing original skincare products online Bangladesh, or looking for dermatologist recommended skincare BD options, thealoy.com delivers an elite, fully certified shopping experience.

Frequently Asked Questions

Will COSRX The Niacinamide 15 Serum feel sticky or heavy on oily skin in hot weather? No. The serum features a lightweight, water-fluid texture engineered to absorb rapidly into skin tracks, leaving a fresh, weightless, and non-greasy finish.

Can I use this 15% Niacinamide serum every day? Yes. The formula is dermatologically tested for daily use. However, because 15% is a potent concentration, Niacinamide beginners should start slowly (once every 1–2 days) to build tolerance before daily morning and night application.

Can I use this serum alongside active Vitamin C or Retinol? Because 15% Niacinamide is a high concentration, it is best to separate active steps—use COSRX The Niacinamide 15 Serum during your morning routine and save Vitamin C or Retinol for opposite routines to prevent over-stimulating sensitive skin.

Is this product effective for blackheads and enlarged pores? Yes. The combination of BHA and 15% Niacinamide clears trapped sebum inside pore channels while tightening slackened pore walls to reduce pore visibility.

Where can I buy the original 20ml COSRX The Niacinamide 15 Serum in Bangladesh? You can purchase the 100% genuine COSRX The Niacinamide 15 Serum 20ml directly from our verified storefront at thealoy.com, featuring secure protective packaging and reliable nationwide delivery.

Safety Information

For external cosmetic use only. Avoid direct contact with internal eye sockets or mouth line; if accidental contact occurs, rinse immediately with clean, cool water. Always apply sunscreen during daytime use. Discontinue use if abnormal irritation, excessive burning, or red localized allergic rashes develop, and consult a dermatologist. Store in a cool, dry place away from direct sunlight and high heat. Keep out of reach of children.