Azelaic Acid: Comedogenic Rating & Safety Profile
Also known as: Nonanedioic Acid
A naturally occurring acid that treats acne, rosacea and pigmentation simultaneously. The most pregnancy-safe active for acne treatment.
Quick facts about Azelaic Acid
Safe
0 = won't clog pores · 5 = highly pore-clogging
Low Risk
0 = inert · 5 = often irritating
Acids
Generally considered safe
Typically yes
Nonanedioic Acid
Quick verdict
Azelaic Acid is a acid with a safe comedogenic profile (0/5) and low risk irritancy (1/5). A naturally occurring acid that treats acne, rosacea and pigmentation simultaneously. The most pregnancy-safe active for acne treatment.
What is Azelaic Acid?
Azelaic acid is a naturally occurring dicarboxylic acid found in grains like wheat, rye and barley. In dermatology it is one of the most multifunctional actives available — it treats inflammatory acne, rosacea, post-inflammatory hyperpigmentation and melasma simultaneously, all with an exceptional safety profile. It is one of the few prescription-strength actives that is fully approved for use in pregnancy and breastfeeding.
Comedogenic Rating: What 0/5 Means for Your Skin
Azelaic acid is rated 0/5 comedogenic. It actively normalises the way skin cells shed inside follicles, reducing the build-up of dead cells that contribute to comedone formation. It also has antibacterial activity against C. acnes, making it useful for both inflammatory and non-inflammatory acne.
Benefits for skin
- Treats acne, rosacea and pigmentation
- Pregnancy-safe alternative to retinoids and hydroquinone
- Anti-inflammatory and antibacterial
- Gentle enough for daily use
Potential side effects & who should avoid it
Azelaic acid has a 1/5 irritancy rating and is one of the gentlest active ingredients. The most common side effect is mild tingling or stinging in the first 1–2 weeks of use, which usually settles. Genuine allergy is very rare. It is one of very few actives that is safe in pregnancy, breastfeeding, rosacea and on darker skin tones (where it has a particularly strong record on pigmentation).
Best for
- All skin types
- Sensitive
- Rosacea
- Acne-prone
- Pregnant/breastfeeding
- Pigmented skin
Avoid if
No widely reported groups need to avoid this ingredient. Patch-test if you have a history of sensitivities.
How to use Azelaic Acid safely
Apply 10–20% azelaic acid morning and/or evening to clean skin. Layer with niacinamide, retinoids, vitamin C or hyaluronic acid — no interaction risk. Daily SPF recommended.
Commonly found in
Azelaic acid is in serums, gels and creams at 10% (over-the-counter) and 15–20% (prescription, branded as Skinoren or Finacea).
Found Azelaic Acid in your skincare?
Paste the full ingredient list into our INCI Analyser to see how this ingredient interacts with everything else in the formula.
Frequently asked questions
Other acids to know
Retinol
A Vitamin A derivative that accelerates cell turnover, boosts collagen and is the gold-standard ingredient for reducing wrinkles and acne.
Salicylic Acid
An oil-soluble exfoliant that penetrates into pores to dissolve sebum, dead skin and the plugs that cause blackheads and acne.
Glycolic Acid
The smallest AHA molecule, derived from sugarcane. It exfoliates the surface of the skin to reveal smoother, brighter, more even-toned skin.
Benzoyl Peroxide
An over-the-counter antibacterial that kills C. acnes bacteria and reduces inflammation. Often the first-line treatment for inflammatory acne.
Want the full picture on pore-clogging ingredients? Read our complete guide to comedogenic ingredients for the dermatology research behind the 0–5 scale and the full list of high-risk ingredients to avoid.
Written by ScanSkinAI Team · Last updated May 2026
This information is for educational purposes only. Always patch-test new products and consult a dermatologist if you have specific skin concerns.