If you’re swirling this into your moisturizer, stop. You’re diluting the whole point — azelaic acid needs a clean, dry canvas to actually bite into your pores.
The magic happens when it’s the *last* active before your occlusive. Mixing it turns a 20% powerhouse into a sad, watery 5% that just sits there.
Cortas is the no-frills Spanish pharmacy version of azelaic acid 20% — it costs about $12 and hits harder than most prescription creams I’ve tried. The claim: smooth texture, fade marks, kill the bacteria that causes rosacea bumps.
Micronized particles
Feels gritty at first, but melts in 15 seconds flat — no pilling under sunscreen.
No silicone base
Unlike The Ordinary, this doesn’t sit on top. It sinks in like a serum, not a primer.
pH-stabilized formula
Stays active even when your skin’s slightly acidic — most azelaic acids degrade on contact.
Photo: Element5 Digital / Unsplash
It’s not complicated — that’s the point. Azelaic acid 20% does the heavy lifting, but the base is what makes it tolerable. No fragrance, no essential oils, no nonsense.
- Azelaic Acid 20%: Zaps acne bacteria and fades post-blemish marks
- Allantoin: Calms the sting so you don’t peel like a lizard
- Glycerin: Pulls water in so it doesn’t dry you out
- Dimethicone: Light barrier so it doesn’t evaporate before working
Photo: Harper Sunday / Unsplash
It’s a thick, almost matte cream that feels like a primer — not greasy, not watery. First application: mild tingle for 60 seconds, then nothing. That’s the sweet spot.
By week two, my forehead texture was legitimately gone. The surprise? It made my sunscreen apply *better* — the slight tackiness gives foundation something to grip. Weird, but I’ll take it.
Photo: ibnu ihza / Unsplash
Red marks from old breakouts faded 60% in three weeks. Active pimples dried up in two days instead of five. But my deep cystic hormonal spots? Untouched — this isn’t a miracle worker, it’s a surface-level sheriff.
Photo: Vedansh Agrawal / Unsplash
This is the acid I use when I want results without the peeling drama of retinoids. Just layer it right — clean, dry, last step before moisturizer — and it’ll do the boring work of making your skin look expensive.