The Niacinamide 15 Serum

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COSRX The Niacinamide 15 Serum runs niacinamide at 15% — the practical maximum, above which most skin starts objecting. Paired with NAG, zinc PCA and allantoin, it is built for total acne control rather than general brightening: sebum, inflammation, congestion and post-acne marks in one step.

🎯 What It Does

• Controls acne comprehensively — sebum, inflammation and post-acne scarring together
• Calms active breakouts — soothes the inflammation behind them
• Regulates oil — reduces sebum production at the source
• Clears congested pores — diminishes the appearance of blocked, enlarged pores
• Smooths rough skin — addresses dead cell buildup and texture
• Fades marks — NAG works with niacinamide on post-acne hyperpigmentation

🔬 Key Ingredients

• Niacinamide 15% — controls sebum, soothes inflammation and fades post-acne scars
• N-Acetylglucosamine (NAG) — works with niacinamide to fade hyperpigmentation
• Zinc PCA — inhibits inflammation and promotes recovery of damaged skin
• Allantoin — supports collagen synthesis and skin regeneration

📋 How to Use

1. After cleansing, apply a few drops during the serum step.
2. Massage gently from the centre of the face outwards.
3. Can be used morning and/or evening — high concentration does not mean night-only.
4. If applied in the morning, follow with SPF 30 or higher.

At 15%, niacinamide can cause flushing in skin unaccustomed to it. Introduce gradually. If you also use direct Vitamin C, apply them at separate times of day.

👤 Best For

Skin Type: Oily, Combination, Acne-Prone
Concerns: Acne, Whiteheads & Blackheads, Enlarged Pores, Excess Sebum, Rough Texture
Texture: Concentrated serum

📊 At a Glance