Description : Azelaic Acid Serum features a 10% concentration of ultra high-purity Azelaic Acid in a lightweight serum. Our Azelaic Acid is the highest grade of azelaic acid (Azepur99® > ± 99%) in the world, specifically developed for cosmetic applications. Features Vitamin B3 (Niacinamide) to reduce Trans Epidermal Water Loss (TEWL), thus increasing hydration and helping the skin’s ability to repair itself.