Azelaic acid is an organic acid widely used in dermatology because of its high antibacterial properties. Azelaic acid has not only antibacterial properties: its chemical properties also confer antioxidant anti-inflammatory properties, an inhibition of the proliferation of keratinocytes and a depigmentation. Composition: 20% azelaic acid 2% salicylic acid 3% lactic acid 1% arnica