Lipophilic Pore Penetration: The Chemistry of BHA Purging
Salicylic Acid is a beta-hydroxy acid (BHA) whose oil-soluble (lipophilic) molecular structure allows it to dissolve through intercellular lipid barriers inside sebaceous follicles. By breaking down desmosomal bonds holding dead keratinocytes together, BHA solubilizes hardened sebum plugs and accelerates cellular turnover.
Why Micro-Comedones Purge Simultaneously
Because BHA increases epidermal cell turnover from the normal 28–40 day cycle down to 14 days, all subterranean micro-comedones (hidden pimples brewing beneath the stratum corneum) are forced to surface at once. Purging is not creating new acne; it is expediting the eruption of pre-existing micro-comedones.