Using glycolic acid on armpits has become a popular natural deodorant technique, as the AHA effectively lowers your skin’s pH and makes it too acidic for odor-causing bacteria to thrive. It can also help smooth a bumpy texture and fade discoloration in the area. However, we don’t recommend applying just any glycolic acid toner or serum on your pits. If an acid-based deodorant contains glycolic acid, that’s fine, but proceed with caution—especially if you have sensitive skin.
“You can use glycolic acid under your armpits to help smoothen and brighten your skin. The same rules that apply for your face apply to your armpits,” says Idriss. “However, it’s about damn time to normalize dark underarms, because it is completely normal!”
