Gently exfoliating while treating blemishes, these BHA (also known as salicylic acid) products revive dull, troubled skin. Anti-inflammatory and purifying, BHA works hard in staples such as the CosRX BHA Blackhead Power Liquid and Plenaire Violet Paste to unveil smooth, even skin. A kind alternative to physical exfoliants, it’s safe for all skin types, especially acne-prone and congested complexions.