The COSRX The Niacinamide 15 Serum (1.01 fl oz / 30 ml each, 2-pack) is a high-strength Korean skincare treatment formulated to target acne, excess oil, enlarged pores, and uneven skin tone.
Key Features
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15% Niacinamide – A potent concentration for controlling sebum, reducing redness, and improving skin clarity.
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Multi-Stage Acne Care – Addresses all stages of acne, from prevention to post-acne mark fading.
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Oil Control & Pore Care – Helps minimize pore appearance and regulate excess oil production.
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Texture Refinement – Smooths rough skin and boosts radiance.
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Hydration & Firmness – Balances moisture while supporting skin elasticity.
Star Ingredients
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Niacinamide (15%) – Brightens, evens tone, and strengthens the skin barrier.
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Acetyl Glucosamine – Works synergistically with niacinamide to fade hyperpigmentation.
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Zinc PCA – Calms inflammation and supports healing.
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Allantoin – Soothes and promotes skin regeneration.
Texture & Use
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Lightweight, fast-absorbing formula that layers well under other skincare or makeup.
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Suitable for oily, combination, and acne-prone skin.
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Can be used morning and/or night (SPF recommended if used in the morning).
How to Apply
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After cleansing and toning, apply a few drops to the face.
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Gently massage from the center outward until absorbed.
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Follow with moisturizer (and sunscreen in the AM).
The 2-pack is ideal if you want to stock up or use it consistently for long-term results, as niacinamide works best with regular use.