BHA
A beta-hydroxy acid, lipid-soluble, derived from willow bark.
Penetrates into the pore to dissolve oil and dead cells, helping with congestion, blackheads, and breakouts.
Cleansers, toners, spot treatments, masks; 0.5–2% leave-on.
Oily, combination, and breakout-prone skin; congested pores.
Can dry the barrier if overused; avoid on compromised or pregnant clients; increase sun sensitivity mildly.
It targets oil/pore congestion, not surface texture the way AHAs do — they are not interchangeable.
Avoid layering with other exfoliants in one routine; separate from retinoids if irritation.
Frame as a 'pore decongestant' best for oily/breakout skin — used 2–4x weekly, not constantly.