Azelaic acid
Multitasker: acne, rosacea and pigmentation, with little irritation.
What the evidence says
Solid clinical and regulatory backing (at 10–20%).
How to use it
Start with 10% once a day (morning or night — it doesn't photosensitize) and move to twice daily if tolerated. Mild tingling in the first applications is normal and fades. Results on spots and redness take 6–8 weeks.
What it pairs with
Pairs well with niacinamide (an excellent duo for dark spots) and hydrators. Compatible with retinoids and BHA on alternating nights; if you have rosacea, introduce actives one at a time.
Frequently asked questions
Does azelaic acid help rosacea?
Yes — it's one of the few cosmetic actives with clinical backing for rosacea: 15% is an approved treatment, and cosmetic 10% helps with redness and inflamed bumps. It's among the gentlest actives for reactive skin.
Is it safe during pregnancy?
Yes, azelaic acid is considered safe during pregnancy and breastfeeding — which is why it's the usual stand-in for retinoids and other acne treatments during this stage. When in doubt, always check with your dermatologist.
Azelaic acid or niacinamide for dark spots?
Both have evidence and work through different pathways (azelaic inhibits tyrosinase; niacinamide slows melanin transfer), so the best answer is usually to combine them. If you must pick one for post-acne marks, go azelaic.