Dr. Althea 15% Niacinamide Purity Serum (30 ml) is a high-strength yet skin-friendly serum formulated to visibly improve pores, balance oil, and brighten uneven skin tone. With 15% pure Niacinamide, this serum helps reduce dark spots, minimize the appearance of pores, control excess sebum, and strengthen the skin barrier�leaving skin clear, smooth, and refined.