Dr.Althea 15% Niacinamide Purity Serum 30mlDr. Altheas 15% Niacinamide Purity Serum contains 15% Niacinamide at a high concentration and provides effective brightening and pore care. With Zinc PCA to regulate sebum and oil and MELACUT complex to soothe the skin and improve the skin texture, our Purity Serum helps to improve the overall tone and condition of your skin. With 15% Niacinamide, it helps to improve large pores and takes care of the skin tone. Zinc PCA serves as a natural