As an exfoliator, Salicylic Acid is a Beta Hydroxy Acid (BHA). BHAs work below the surface of the skin to unclog pores and reduce oil, which helps to reduce acne formation. The 2.0% Salicylic Acid serum formulates for all skin types, including those who are prone to acne and blemishes. Using serum formula daily eliminates dead skin cells that contribute to clogged pores, giving your skin a clear appearance. The serum strategically developed with Zinc PCA to provide synergy with salicylic acid because Zinc intensifies the serum's antibacterial and astringent characteristics, allowing it to regulate oil production and acne breakouts more effectively. Balanced pH: 3.5-4.0