Two acids, two completely different jobs AHA stands for alpha hydroxy acid. BHA stands for beta hydroxy acid. Both are ...

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.

Rachael Link is a registered dietitian and health writer based in San Francisco. She completed her undergraduate degree at the University of Central Missouri and holds a master’s degree from New York ...

Polyglutamic acid (PGA) and hyaluronic acid (HA) are both powerhouse hydrators, but they function differently on the skin. While HA penetrates deeper to attract moisture, PGA sits on the surface to ...