Is Azelaic Acid Worth the Hype?

Azelaic acid is having a moment.

Half of my feed is people pairing it with tretinoin and calling it the secret to glowing skin. The other half is videos claiming some of the most popular Korean azelaic acid serums are basically scams. Both can’t be the whole truth, so let’s actually look at it.

I went through the science and four options in this video. Here I want to explain why the controversy exists, and why it mostly misses the point.

What azelaic acid actually does

Despite the name, azelaic acid isn’t an exfoliating acid in the way glycolic or salicylic acid are. It works differently, and it does several jobs at once.

It calms inflammation. It helps normalize how skin cells shed inside the pore, so they’re less likely to clog. It has activity against the bacteria involved in acne. And it slows down tyrosinase, an enzyme your skin uses to make pigment.

A fun fact: azelaic acid is made by a yeast on the skin that causes a condition with light patches called pityriasis versicolor. Those patches happen partly because azelaic acid slows pigment production. Annoying in that condition, but useful when you’re trying to fade post-acne marks or melasma.

That combination is why it shows up for acne, rosacea, and pigmentation. A 2023 systematic review looked at 43 randomized trials and found supporting evidence for all three. That’s not a trend. That’s a real ingredient.

So is the Korean serum a scam?

Here’s the argument going around. Azelaic acid barely dissolves in water, so how can a clear, watery serum contain 10%? The answer is that the formula raises the pH, which turns azelaic acid into a salt form that does dissolve. The claim is that this salt form can’t get through the skin barrier, so it can’t work.

There’s some legitimate chemistry in that. Charged molecules generally do have a harder time getting through skin.

But it ignores biology. There’s data suggesting a higher pH may actually help azelaic acid get into cells. And one of its main jobs, acting on acne bacteria, happens at the surface and in the pore. It doesn’t need to travel deep through the barrier to do that.

So my take: no, I don’t think it’s a scam. Yes, I’d like to see more data directly on the salt form. Both can be true. Skin is more complicated than a single chemistry rule, and that’s usually where viral “exposés” go wrong.

Compare the whole formula, not the percentage

Three common products all say 10% azelaic acid. They’re very different experiences.

Anua 10% Azelaic Acid serum is lightweight and hydrating, with panthenol, centella, niacinamide, ceramides, and other soothing ingredients. Very K-beauty: comfort first. Suited to sensitive or dry skin, or anyone who dislikes thick creams.

Paula’s Choice 10% Azelaic Acid Booster adds 0.5% salicylic acid and licorice, so it combines azelaic acid, a pore-clearing exfoliant, and a pigment helper. It’s aimed at acne, clogged pores, and the marks left behind. It’s less suited to very reactive skin or rosacea, or to anyone already using another exfoliant.

The Ordinary Azelaic Acid Suspension 10% takes the opposite approach. Instead of dissolving the azelaic acid, it suspends it in a silicone cream at a lower pH. That’s a legitimate way to deliver a poorly soluble ingredient. The trade-off is texture: it can feel a bit gritty or heavy, and it’s azelaic acid and nothing else. It fits people who already have a solid routine and just want to add one thing.

When prescription makes more sense

Prescription azelaic acid (15% gel or foam, or 20% cream) has something the cosmetic versions don’t: studies on the finished product itself. In two large trials in rosacea, the 15% gel reduced inflammatory bumps noticeably more than the base gel over 12 weeks.

The bigger advantage, honestly, is getting the right diagnosis. Acne, rosacea, perioral dermatitis, and general redness can look alike but need different plans. That matters more than the percentage on the tube.

The downside: it stings more, especially in the first few weeks, and cost depends on your coverage and pharmacy.

How to use it

Use a pea-sized amount over the whole face, not just on spots. Start once a day or every other day. If it stings, moisturize before or after and use it less often until your skin settles.

You can use it with retinoids, other acids, or benzoyl peroxide; just don’t start everything in the same week. And remember the Paula’s Choice and Anua formulas already have exfoliating or active extras, so think twice before stacking another salicylic acid on top.

Morning or night both work. If you use it in the morning and you’re treating pigment, apply sunscreen after.

Judge it at 8 to 12 weeks, not five days, and keep in mind that results vary from person to person.

The percentage on the front of the bottle tells you the least about a product. The rest of the formula, and whether it fits your skin, tells you almost everything.