Azelaic Acid

Azelaic acid is a naturally occurring dicarboxylic acid (from grains) with a uniquely broad efficacy profile. It is anti-inflammatory, antibacterial against Cutibacterium acnes, comedolytic, and a mild tyrosinase inhibitor — making it simultaneously effective against acne, rosacea, and hyperpigmentation. At 10% over the counter it reduces blemishes and redness; prescription 15–20% treats melasma and papulopustular rosacea. Unlike AHAs it does not increase photosensitivity, and unlike hydroquinone it is safe for long-term use on all skin tones. Slight tingling at first use is normal. It layers under sunscreen and suits virtually everyone seeking clearer, calmer, more even skin.