COSRX Niacinamide 15% Face Serum, 0.67 fl oz — Pore Minimizer with Zinc PCA, Lightweight Texture Refiner

COSRX 15% Niacinamide Face Serum is a concentrated Korean skincare treatment formulated to reduce the appearance of enlarged pores, control shine, and support a more even skin tone.

This lightweight serum combines a high-strength 15% niacinamide concentration with Zinc PCA to target texture, surface oil, and visible pore size without heavy residue. Packaged in a compact 0.67 fl oz bottle, it’s intended as a daily booster layered under moisturizers or sunscreen to help skin look smoother and more refined over time. The formula is designed for targeted results while fitting into morning or evening routines.

How does this serum help reduce the look of pores?

Niacinamide at 15% supports the skin’s natural surface renewal processes, helping pores appear less noticeable as texture evens out. Zinc PCA works alongside to manage excess oil that can make pores look more prominent, creating a cleaner-feeling skin surface.

• High 15% niacinamide concentration for targeted texture improvement
• Zinc PCA to control sebum and reduce pore-clogging factors
• Lightweight liquid that sinks in without leaving heavy film

When and how should I apply the COSRX niacinamide serum?

Use 2–3 drops once or twice daily, after cleansing and before moisturizer. In daytime routines always follow with a broad-spectrum SPF 30+; at night it pairs well with hydrators or treatments that don’t conflict with niacinamide.

• Apply a few drops to face and neck, avoiding direct contact with eyes
• Layer under moisturizer or sunscreen for daytime protection
• Perform a patch test first and stop use if irritation appears

Is this serum suitable for sensitive or breakout-prone skin?

The formula targets oil balance and texture while containing ingredients that are commonly used for sensitivity-conscious routines, but high-strength actives can still cause reactions for some individuals. A recommended patch test helps confirm skin compatibility before full-face application.

• Patch test on the inner arm for 24 hours before full use
• Zinc PCA can help reduce conditions that lead to breakouts
• Avoid if you experience stinging or redness after the patch test

What results can I expect and how quickly?

Visible improvements vary by person and routine consistency; many users report smoother texture, reduced shine, and less noticeable pores with regular use over several weeks. For best outcomes, pair the serum with sunscreen during the day and maintain a gentle overall regimen.

• Consistent use typically needed for several weeks to see texture changes
• Combining with daily SPF prevents new sun-related texture issues
• Works best as part of a full skincare routine focused on balance

Who this is for: COSRX 15% Niacinamide Face Serum is aimed at people looking to refine visible pores, reduce surface oil, and even out skin tone without heavy creams. It’s suited to oily, combination, and textured skin types wanting a targeted active treatment; those with very reactive skin should patch test first. With compact packaging and potent actives, it’s a good choice for anyone adding a focused niacinamide boost to their daily skincare steps.

Ingredients

Water, Pentylene Glycol, Niacinamide, Butylene Glycol, Acetyl Glucosamine, 1,2-Hexanediol, Zinc PCA, Trehalose, Xanthan Gum, Pullulan, Allantoin, Ethylhexylglycerin, Sodium Phytate, Citric Acid, Tocopherol