Adapalene, 0.1% gel, is the only retinoid available OTC. Azelaic acid occurs naturally in barley and grain. It helps block ...

5. Azelaic Acid How to use it: Azelaic acid can be found in prescription-strength creams as well as a prescription gel. There are also lower-grade options available in over-the-counter serums and ...

for example), azelaic acid can be found over the counter. All eight of my experts recommend the ingredient: It works by killing bacteria found in pores and decreasing the body’s production of ...