Serum
Paula's ChoiceSkin Perfecting 2% BHA Liquid Exfoliant
Salicylic Acid
BHA
Clears pores and helps with breakouts. Safe in small amounts, but drying if layered with other acids.
Safe amount 2 studies cited
Regulators cap leave-on products at 2%; rinse-off up to 3%
Technical data
Dose-response breakdown and source citations behind the rating above.
Safety by concentration
Up to 2% (leave-on)Generally safe
Cited sources
Salicylic acid as a peeling agent: a comprehensive review
Arif, Clinical, Cosmetic and Investigational Dermatology · 2015
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Frequently asked questions
Is Salicylic Acid safe?
Clears pores and helps with breakouts. Safe in small amounts, but drying if layered with other acids. Regulators cap leave-on products at 2%; rinse-off up to 3%