Azelaic acid is a naturally occurring acid found in grains such as barley, wheat, and rye.
It has antimicrobial and anti-inflammatory properties, which make it effective in the treatment of skin conditions like acne and rosacea. The acid can prevent future outbreaks and clean bacteria from your pores that causes acne.
Azelaic acid is applied to your skin and is available in gel, foam, and cream form.

This plant-based acid is proof that you don’t need to use a scrub to exfoliate. “Azelaic acid is a favorite of dermatologists because it helps brighten the skin and reduces dark marks,” says Dr. Melissa Kanchanapoomi Levin, a board-certified dermatologist and founder of Entière Dermatology. The ingredient is derived from various whole grains, like wheat and rye, and is also produced naturally by the yeast that lives on your skin. Azelaic acid also has antibacterial and anti-inflammatory properties that help fight acne and reduce redness (which is good news for those who are rosacea prone!)