COSRX The Niacinamide 15 Serum is a highly concentrated formula containing 15% niacinamide, blended with Acetyl Glucosamine and Zinc PCA to provide comprehensive acne care. COSRX niacinamide serum has lightweight texture that allows for quick absorption, effectively targeting excess oil, uneven skin tone, lack of radiance, and rough skin texture. This optimal combination of ingredients helps to minimize pores, refine skin texture, and brighten the complexion. COSRX’s 15% Niacinamide Serum has been shown in consumer assessments to reduce pore size, improve skin texture, and fade dark spots, plus 1% Zinc PCA helps prevent breakouts. Recommended for oily, combination, and acne-prone skin, it addresses all stages of acne, from the initial to the final stage, offering a complete solution. Its key benefits include smoothing bumpy skin, controlling sebum, minimizing pores, improving evenness of skin tone, and fading hyperpigmentation. With a light, refreshing texture, this is one of the best niacinamide serum that absorbs quickly without residue and is easy to layer under other skincare products or makeup.