Health officials have warned that long-term use of acid reflux drugs to combat indigestion could increase the risk of developing a potentially deadly bacterial infection. Acid reflux—when stomach acid ...

Azelaic acid is a type of acid that's found in some grains like rye, wheat, and barley. It's naturally produced by Malassezia furfur (also known as Pityrosporum ovale), a yeast found on healthy skin.