Salicylic Acid is a beta hydroxy acid that occurs as a natural compound in plants. It has direct activity as an anti-inflammatory agent and acts as a topical antibacterial agent due to its ability to promote exfoliation. Salicylic acid dries out excess oils (sebum) in your pores. Also, its antimicrobial properties relieve inflammation caused by acne. For extra hydration, you can follow this exfoliating serum with 5% hyaluronic acid serum.