Azelaic Acid
Skincare ingredient, decoded — every claim sourced.
What it is
A multitasking acid that helps the look of redness and bumps, supports a more even-looking tone by fading the appearance of dark marks, and gently helps keep pores looking clear — well tolerated even on sensitive skin.
How it works
Azelaic acid is a naturally occurring nine-carbon dicarboxylic acid (also made by skin yeast). It works on several fronts at once. For the look of dark marks it competitively inhibits tyrosinase — the copper enzyme that converts tyrosine into the precursors of melanin — acting mainly on overactive pigment cells rather than normal ones, which is why it tends to fade the appearance of discoloration without over-lightening healthy-looking skin. For the appearance of redness and bumps it supports a calmer-looking complexion by scavenging reactive oxygen species and, in skin-redness research, by reducing kallikrein-5 (a serine protease), the cathelicidin peptide LL-37, and toll-like receptor 2 (TLR-2) signaling — pathways linked to a flushed, reddened look. It is also bacteriostatic and helps normalize the shedding of cells lining the pore, supporting a clearer-looking pore appearance.
Works well with
NiacinamideHyaluronic AcidTopical Retinoids (apply at different times to limit irritation)Mineral Sunscreen (essential when working on the look of dark marks)
Introduce carefully alongside
Strong AHA/BHA exfoliating acids in the same application (layer at separate times to reduce stinging)High-strength benzoyl peroxide simultaneously (alternate to avoid added dryness/irritation)
Who should take care
Anyone with a known sensitivity to azelaic acid. Those with very reactive, broken or visibly inflamed skin should start slowly (lower strength, every other day) since early stinging is more likely. It is widely regarded as one of the gentler actives during pregnancy and breastfeeding — only about 4% is absorbed through skin (this can vary somewhat with the formulation/vehicle), and the lactation database (LactMed) considers it a low risk to the nursing infant and notes it is not a reason to discontinue breastfeeding. Even so, anyone who is pregnant or nursing should confirm their full routine with a doctor before use. If breastfeeding, avoid applying it to the breast or nipple area, prevent the baby's skin from contacting treated areas, and prefer water-miscible cream or gel products there; consult a doctor.
🔒 IN THE APP
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Sources
This is not medical advice at all — cosmetic information only. Not suitable during pregnancy or breastfeeding; always consult your doctor.