Azelaic Acid is a natural occurring acid that encourages cell turnover and therefore reduces comedone formation, hyperpigmentation, melasma, etc. Alleviates the swelling and redness of rosacea, Helps to kill the bacteria that causes acne and rosacea. Also Includes Niacinamide which has a ton of benefits on its own. Such as reduce inflammation and hyperpigmentation, smooth your overall skin texture, and brighten your skin. Use once daily after cleansing and before moisturizing.