Also known as: Nonanedioic Acid
Azelaic acid is a dicarboxylic acid naturally produced by Malassezia yeast on skin. It inhibits tyrosinase, reduces melanin production, and has antibacterial activity against Propionibacterium acnes. At 15–20% it is prescription-strength for rosacea and acne. It is one of the few actives safe during pregnancy. Effective for both hyperpigmentation and inflammatory acne.
Comedogenicity ratings are based on the rabbit ear assay model. Individual skin responses vary. See our article on comedogenicity ratings for context.
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