Product

Paula's Choice BOOST 10% Azelaic Acid Booster

Real 10% azelaic acid in a texture that actually works — for roughly three times the price of The Ordinary.

At a Glance

Mixed

This is real azelaic acid at 10%, in a gel-cream that avoids the grit and pilling of cheaper versions. For an ingredient that is hard to formulate, that is a real advantage.

The trade-off is cost. It is about three times the price of The Ordinary for the same strength of the same molecule. Whether the better texture is worth that is a personal call.

One detail matters by condition. The formula also has 0.5% salicylic acid. For acne, that is a bonus. For rosacea, which is where azelaic acid has its best evidence, the extra acid can be an added irritant.

Key facts

Key active	Azelaic acid 10% + salicylic acid 0.5%
Texture	Smooth gel-cream
Best for	Rosacea, acne, uneven tone
Approximate price	$36–$38
Fragrance	Fragrance free

How it works

It solves the problem The Ordinary's version has. This is a proper gel-cream — no grit, no pilling, no white cast. For an ingredient that is notoriously hard to formulate, that is worth something real.

It is genuine azelaic acid at 10%, not a derivative.

Fragrance-free, and Paula's Choice is unusually rigorous about disclosure.

Azelaic acid's rosacea evidence is excellent — a major Cochrane review graded it high quality, better than the topical drug it is usually compared with.

Everyday habits

How to use it

When: Once a day to start, then morning and night if your skin is comfortable.How much: A pea-sized amount, alone or mixed into your moisturizer. Steps: Apply to clean, dry skin before heavier creams. Sun care: Use sunscreen during the day. A caveat: Expect some stinging in the first few weeks. Patch test first. If you have rosacea, know that the 0.5% salicylic acid may work against you.

Who should be careful+

$38 for 30 ml — roughly three times The Ordinary's price, for the same 10% of the same molecule. You are paying for the texture. Whether that is worth $26 is a real question, and for some people the answer is genuinely yes.

It also contains 0.5% salicylic acid — and that cuts both ways. For acne, it is a bonus. For rosacea, it is an extra irritant — and rosacea is the single condition azelaic acid has the best evidence for. If you are buying this for rosacea, the added acid is working against you.

The 10% problem applies here too. The trials that made azelaic acid's name used 15% or 20%. There are essentially no good studies at 10%.

Expect stinging in the first few weeks.

It can lighten deeper skin tones.

Questions people ask+

Is this real azelaic acid?Yes, at 10%, not a derivative.

How is it different from The Ordinary?Same strength, much smoother texture, and about three times the price.

Is it good for rosacea?Azelaic acid is, but the added salicylic acid may irritate rosacea-prone skin.

Is it fragrance-free?Yes.

Will it sting?Some stinging is common early on. It can also lighten deeper skin tones.

Full ingredient list+

Water, Azelaic Acid, C12-15 Alkyl Benzoate, Caprylic/Capric Triglyceride, Methyl Glucose Sesquistearate, Glycerin, Cetearyl Alcohol, Glyceryl Stearate, Dimethicone, Salicylic Acid, Adenosine, Glycyrrhiza Glabra Root Extract, Boerhavia Diffusa Root Extract, Allantoin, Bisabolol, Cyclopentasiloxane, Xanthan Gum, Sclerotium Gum, Propanediol, Butylene Glycol, Phenoxyethanol

References+

1. Interventions for rosacea (https://pmc.ncbi.nlm.nih.gov/articles/PMC6481562/) — This Cochrane systematic review (van Zuuren et al., 2015) rated topical azelaic acid's rosacea evidence as high quality while rating topical metronidazole only moderate quality, backing the page's claim that a major Cochrane review graded azelaic acid high quality and stronger than the drug it is usually compared with. 2. Interventions for Rosacea (JAMA clinical evidence synopsis) (https://doi.org/10.1001/jama.2015.15287) — This JAMA synopsis of the Cochrane review confirms there is high-quality evidence that topical azelaic acid improves rosacea, versus lower-quality evidence for topical metronidazole, supporting the claim that azelaic acid's rosacea evidence is excellent. 3. A comparison of topical azelaic acid 20% cream and topical metronidazole 0.75% cream in the treatment of patients with papulopustular rosacea (https://doi.org/10.1016/s0190-9622(99)70085-x) — This double-blind randomized split-face trial found azelaic acid at least as effective as metronidazole for papulopustular rosacea, with a significantly higher physician-rated global improvement, supporting the claim that azelaic acid compares favorably to the topical drug it is usually compared with (metronidazole).