The Azelaic Acid 10% Serum with Niacinamide by Cos de Baha is a targeted skincare serum that offers multiple benefits for the skin. With the combination of azelaic acid and niacinamide, this serum helps to improve the appearance of acne, reduce redness, and control oiliness. It also has brightening properties and aids in minimizing the appearance of dark spots. However, it is important to note that individual results may vary and it is recommended to do a patch test before full application.