Cosrx The Niacinamide 15 Serum 20 ml

COSRX The Niacinamide 15 Serum 20 ml is a high-strength Korean serum for excess oil, enlarged pores, recurring breakouts, and post-acne marks. It combines 15% Niacinamide, 2% Acetyl Glucosamine (NAG), and 1% Zinc PCA to balance sebum, improve texture, and visibly refine pores without feeling heavy or greasy.

Built on a Triple Sebum-Control Complex, this fragrance-free, alcohol-free treatment is designed especially for oily, combination, and acne-prone skin, though other skin types can use it with gradual introduction. Its lightweight, fast-absorbing texture layers comfortably with moisturizer and sunscreen, and its supporting hydrators keep skin comfortable rather than stripped — making it well suited to daily use, including in hot, humid climates, for both beginner and experienced K-Beauty routines.

Key Benefits

•           Controls excess sebum – 15% Niacinamide and Zinc PCA reduce shine for a fresher complexion

•           Refines the look of enlarged pores – smooths texture without over-drying

•           Improves post-acne marks – NAG works with Niacinamide to even out discoloration

•           Smooths rough texture – supports a clearer, more refined-looking complexion

•           Balances oil without stripping – maintains hydration and skin barrier health

•           Lightweight, non-greasy – fast-absorbing, comfortable in humid climates

•           Supports clearer-looking, blemish-prone skin – ideal for congestion and blackheads

Key Ingredients

15% Niacinamide (Vitamin B3) is a high-strength concentration that regulates excess oil, refines enlarged pores, brightens uneven tone, strengthens the skin barrier, and smooths texture — beginners should introduce it gradually. 2% Acetyl Glucosamine (NAG) works synergistically with Niacinamide to improve post-acne discoloration and rough texture. 1% Zinc PCA helps regulate sebum while maintaining hydration, supporting a balanced, less shiny complexion.

Trehalose, Pentylene Glycol, and Butylene Glycol maintain hydration and improve absorption, Allantoin soothes and supports the skin barrier, and Tocopherol (Vitamin E) provides antioxidant protection against environmental stress.

Note: Ingredient lists may be updated by the manufacturer — always check packaging for current INCI details.

Product Specifications

Skin Type Suitability

Ideal for oily skin needing sebum control, combination skin balancing oil without over-drying, and acne-prone skin targeting post-acne marks and congestion. Normal skin benefits from smoother texture and clarity, while it also suits humid-climate skincare. Sensitive and dry skin can use it with gradual introduction, a patch test, and a hydrating moisturizer. Avoid if you have known allergies or broken/irritated skin; consult a professional if pregnant or breastfeeding.

How To Use

After cleansing and toner, apply 2–3 drops and pat gently over the face and neck until absorbed, then follow with a lightweight moisturizer. Beginners should start 2–3 evenings/week, increasing gradually to daily use as skin adjusts. Always finish daytime routines with broad-spectrum sunscreen (SPF 30+); patch test before first use.

Authenticity

COSRX is a globally recognized Korean skincare brand known for evidence-based, fragrance-free formulations rather than exaggerated claims. To ensure authenticity, buy from an authorized retailer specializing in genuine Korean skincare, and check for the official COSRX logo, batch number, and expiry date.

Frequently Asked Questions

1. What is this serum for? A high-strength Korean serum with 15% Niacinamide, 2% NAG, and 1% Zinc PCA that controls oil, refines enlarged pores, and improves post-acne marks and texture.

2. Is 15% Niacinamide too strong for beginners? It’s a high-strength concentration — start 2–3 evenings/week, patch test first, and increase gradually as skin adjusts.

3. Can it help with enlarged pores? Yes — by balancing sebum and refining texture, though no skincare permanently shrinks pores.

4. Does it help fade acne marks? Yes — Niacinamide and NAG together improve post-acne discoloration and uneven tone with consistent use and daily sunscreen.

5. Does Niacinamide cause purging? No — it doesn’t significantly increase cell turnover like retinoids or acids, so new breakouts are usually unrelated to purging.

6. Can I use it with Vitamin C, Retinol, or BHA? Yes — it layers well with Vitamin C, Retinol, Salicylic Acid, Azelaic Acid, and Hyaluronic Acid; introduce combinations gradually.

7. How long until I see results? Oil control and smoother skin often appear within 2–4 weeks; pore and acne-mark improvements typically show after 6–8 weeks.

8. How do I verify an original product? Buy from a trusted retailer and check the official COSRX logo, batch number, manufacturing details, and expiry date.

Ready for Balanced, Refined-Looking Skin?

Target oil, enlarged pores, and post-acne marks with COSRX The Niacinamide 15 Serum 20 ml — a high-strength, barrier-friendly formula for oily and acne-prone skin. Shop from a trusted retailer today for genuine COSRX quality and a clearer, smoother-looking complexion.