Beta hydroxy acid (BHA) refers to a class of chemical compounds that includes salicylic acid. BHAs are oil-soluble, making ...

Palm says. BHAs stand for beta-hydroxy acids. These chemical exfoliants break down oil and dead skin cells that clog pores. "The most common BHA is salicylic acid," says dermatologist Sheila ...

Known as the gold standard ingredient for helping to prevent blemishes, it’s a BHA (beta-hydroxy acid) that’s naturally occurring in things such as willow bark. “It’s oil-soluble and can ...