And then you have BHA, which actually is only one ingredient. It's salicylic acid. And salicylic acid is the smallest of all the molecules for exfoliants, so it goes deepest into the pore and ...

As well as already having cult status in the beauty industry, The Ordinary’s AHA 30% + BHA 2% Peeling Solution ... while BHAs work at a deeper level to clear pore congestion.

And while there is no one-size-fits-all when it comes to achieving a smoother complexion, a chemical exfoliant containing either AHA or ... that clog pores. "The most common BHA is salicylic ...