Salicylic acid is an FDA approved skin care ingredient used for the topical treatment of acne, and it’s the only beta hydroxy acid (BHA) used in skin care products. Perfect for oily skin, salicylic acid is best known for its ability to deep clean excess oil out of pores and reduce oil production moving forward. Because salicylic acid keeps pores clean and unclogged, it prevents future whiteheads and blackheads from developing. Salicylic acid also exfoliates dead skin, and its anti-inflammatory properties make it a prime ingredient for those with psoriasis. Salicylic acid naturally occurs in willow bark, sweet birch bark, and wintergreen leaves, but synthetic versions are also used in skin care products.