COSRX 15% Niacinamide Face Serum — 0.67 fl oz Pore-Minimizing, Oil-Balancing Treatment for Even Skin Tone

COSRX 15% Niacinamide Face Serum is a concentrated lightweight serum designed to reduce visible pores, balance oil, and promote a more even skin tone.

This Korean-formulated treatment combines a high 15% niacinamide concentration with Zinc PCA to target texture, excess sebum, and uneven pigmentation without heavy silicones or thick oils. The fast-absorbing liquid works well layered into most routines, morning or night, and is suitable for those looking to refine pore appearance and calm minor redness while maintaining hydration.

How quickly will I notice changes in pore size and texture?

Individual results vary, but many users see smoother texture and reduced shine within a few weeks of regular use. Consistency matters: apply the serum once or twice daily and pair with sunscreen during the day to protect results.

• Apply 2–3 drops to clean skin morning and/or night.
• Visible texture improvement often appears after 2–6 weeks of steady use.
• Use SPF 30+ daily to prevent new pigmentation and support even tone.

Can this serum help with redness and breakouts?

The formula targets excess oil and helps stabilize microbiome-prone areas using Zinc PCA, which can reduce the conditions that lead to blemishes. Niacinamide supports the appearance of calmer skin and more uniform tone without harsh exfoliation.

• Zinc PCA helps regulate sebum and reduce potential breakout triggers.
• Niacinamide reduces the look of redness and strengthens skin’s visible barrier function.
• Suitable to layer under moisturizers; avoid direct eye contact.

How should I add this serum to my skincare routine?

Introduce the serum after cleansing and any water-based treatments, then follow with moisturizer and SPF during the day. For sensitive skin, begin with once-daily use or every other day and perform a patch test before full application.

• Cleanse, tone (optional), then apply 2–3 drops of the serum to face.
• Follow with a lightweight moisturizer; apply SPF 30+ each morning.
• If irritation occurs, stop use and consult a healthcare professional.

Is this product suitable for sensitive or acne-prone skin?

The serum is formulated to be gentle but contains a high concentration of niacinamide; many with sensitive or acne-prone skin tolerate it well, especially when introduced gradually. A patch test on the body for 24 hours is recommended before full facial use.

• Perform a patch test; wait 24 hours to confirm no reaction.
• Start with once-daily application to assess tolerance.
• Consult a dermatologist if you have severe sensitivity or active severe inflammatory skin conditions.

Who is this for: COSRX 15% Niacinamide Face Serum is aimed at anyone wanting to refine the appearance of pores, reduce excess oil, and even out skin tone—especially combination, oily, and texture-conscious skin types. It’s a good choice for people building a targeted treatment step into their routine who prefer a lightweight, fast-absorbing formula. If you are new to active ingredients or have very reactive skin, introduce the serum slowly and patch-test first.

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