Azelaic acid 10 vs 15%: serum or prescription?

Azelaic acid 10 vs 15%: it looks like a tiny gap on the bottle. 🧴 In the US, that gap is the line between a serum anyone can buy and a gel you need a doctor for.

Reference: US Food and Drug Administration

So which number did the studies use, and what are you getting at 10%?

Rising in US searches · Jul-Oct 2026

Is 15% azelaic acid a prescription in the US?

Yes. Every azelaic acid product the US FDA has approved is prescription-only: a 15% gel, a 15% foam and a 20% cream. 💊

None of them is approved to sell over the counter, so you can't pick up a 15% gel from a store shelf without a prescription.

Reference: US Food and Drug Administration

Azelaic acid also isn't on the US list of acne ingredients that can be sold without a prescription. That list has salicylic acid and benzoyl peroxide, for example.

Reference: US Food and Drug Administration, 2016

So 15% and 20% are prescription strengths, and the 10% serums sit below that line. The azelaic acid page shows how PERBETE sorts it.

What did the studies test at 15% and 20%?

Reference: Katsambas et al., 1989

The big studies used the prescription strengths. 🧪 In two large trials, people with rosacea bumps used a 15% gel or the same gel without azelaic acid.

The bumps went down by 58% vs 40% in one trial, and by 51% vs 39% in the other. Redness got better too.

Reference: Thiboutot et al., 2003

At 20%, a 6-month study with 289 people compared an azelaic acid cream with 0.05% tretinoin. Both cut clogged pores by about the same amount. 📉

Reference: Katsambas et al., 1989

These are drug-strength results. They show what 15% and 20% did, and the doctor decides who gets them. 🩺

Does 10% azelaic acid work?

PERBETE hasn't found a study of 10% azelaic acid on its own yet. 🔎 10% might still help. Nobody has shown it yet in a published study PERBETE could find.

The closest one mixed 10% azelaic acid with 0.1% retinal in one product.

23 people used it on half of the face for 8 weeks. Skin texture got 10.9% smoother than at the start.

Because two actives were in the same product, nobody can tell how much came from the azelaic acid. 🤷

Reference: Gaudicheau et al., 2026

A study of 15% says what 15% did. It doesn't stretch down to 10% by itself.

Where does azelaic acid sit on the label?

Pretty high up! 📈 On October 29, 2026, PERBETE's catalogue had 86 products listing azelaic acid. 33 of them had it in the first five spots of the ingredient list.

28 of the 86 say azelaic acid right in the product name. At least half of those 28 list it first or second.

So for azelaic acid, the name on the front and the list on the back mostly agree. 🙌

The US label rule for cosmetics asks for the list in order, from the biggest amount down (tiny ones at 1% or less may go in any order at the end). It doesn't ask for percents.

Reference: US Food and Drug Administration, 2016

So a "10%" on the front is the brand's own number, and the list order is your check. A spot near the top fits a big amount. It can't confirm the exact percent.

What does PERBETE's azelaic acid page say?

PERBETE marks azelaic acid 🟡 Moderate concern. The page lists why: it's prescription-only at 15% in the US, and some countries don't allow it in cosmetics at all.

None of the four cancer lists PERBETE checks includes it: IARC, EU CLP, US NTP and California Prop 65.

For pregnancy, a 2022 review lists azelaic acid among skin products that can be used, on small areas and best not in the first 3 months. It's a review of other papers, not a study in pregnant women. Ask your doctor first. 🤰

Reference: Putra et al., 2022

PERBETE's routines never pick a product at prescription strength. The azelaic acid page has every source.

The rosacea and dark spots pages rank what else has study behind it. 👀

How well does azelaic acid fit YOUR skin?

The strength on the bottle is only half of it. 💭 Your skin type, your main worries, the other actives in your routine and whether you're pregnant all change the answer.

The free skin quiz takes 5 questions and builds a routine of 3, 5 or 7 steps around your answers, with every ingredient checked. ✨

How well does azelaic acid fit YOUR skin? Take the free 5-question skin quiz