BHA, or beta hydroxy acid, is a chemical exfoliant that helps clear out pores, loosen dead skin cells, and reduce excess oil. It’s especially useful for acne-prone or oily skin because it can penetrate into pores rather than working only on the surface.

What it does

  • Unclogs pores by dissolving buildup of oil and dead skin cells.
  • Helps reduce blackheads and breakouts.
  • Can calm redness and inflammation a bit, which is why it’s often used for acne-prone skin.
  • Smooths skin texture and may make pores look smaller over time.

Best for

  • Oily skin.
  • Acne-prone skin.
  • Congested skin with blackheads or clogged pores.

Common example

The most common BHA in skincare is salicylic acid, which is often found in cleansers, toners, serums, and spot treatments.

Quick caution

BHAs can be drying or irritating if you overuse them, so it’s usually best to start slowly and build up use as your skin tolerates it.