Paula's Choice 10% Azelaic Acid Booster visibly fades spots and reduces blemishes. Crafted for all skin types, the potent formula utilizes azelaic and salicylic acids. It works to minimize the look of breakouts, dullness, and red marks. Ongoing use may visibly diminish bumps to reveal smoother, more radiant skin. This booster's combination of acids and plant extracts provides multiple benefits.