I've used it a few times, but it didn't agree with my skin, so I'm selling it. This is a calming serum containing 15% azelaic acid, which has a soothing effect on the skin. - Brand: Anua - Product Name: Azelain Acid 15% + Cica - Contents: 30ml - Features: Calming serum - Uses: Soothing and moisturizing the skin Thank you for looking.