15%

The COSRX The Niacinamide 15 Serum is a concentrated daily treatment from the renowned brand COSRX, specifically formulated to address common issues related to oily and blemish-prone skin. This powerful formula contains a high concentration of 15% Niacinamide (Vitamin B3), which is proven to significantly reduce the appearance of enlarged pores by normalizing the pore lining. Working in synergy with N-Acetylglucosamine (NAG) to target hyperpigmentation and Zinc PCA to regulate sebum production, this serum effectively clarifies skin texture, minimizes shine, and visibly fades post-acne marks (PIE/PIH) for a smoother, clearer, and more refined complexion.