COS DE BAHA – Azelaic Acid 10% Serum – 30ml – 100% Original …Cos De BAHA is a South Korean K-beauty brand, established in 2019, known for its affordable, high-quality, vegan, and cruelty-free skincare products formulated with high concentrations of active ingredients like Niacinamide, Vitamin C, and Azelaic Acid. The brand focuses on science-backed, effective solutions for various skin concerns, using natural ingredients like Aloe Vera extract as a base and avoiding harmful additives such as parabens, sulfates, and artificial fragrances.