Soothing serum containing 16% azelaic acid. - Brand: medicube - Product Name: Azelac Acid 16 BB Calming Serum - Concentration: 16% Azelaic Acid - Volume: 30ml - Description: Serum containing azelaic acid, effective for soothing the skin. I had a skin analysis after purchasing this, and it turned out this serum wasn't a great match for my skin type, so I'm offering it to someone who can use it! It's brand new and unused!