La Roche Posay Effaclar Salicylic Acid Acne Treatment is a lightweight salicylic acid acne treatment serum clears acne blemishes and helps prevent new breakouts, while also visibly reducing pores, fine lines, and post-acne marks. This serum includes Triple Acid Complex, a blend of 1.5% salicylic acid, glycolic acid, and micro-exfoliating lipo-hydroxy acid for optimal efficacy. This formula also includes Niacinamide and La Roche-Posay Thermal Water to help soothe skin and minimize skin irritation. Clears acne blemishes and helps prevent new breakouts. Visibly reduces pores, fine lines, and post-acne marks. Helps soothe skin and minimize skin irritation 45% reduction of pimples, 21% reduction of whiteheads and blackheads, 49% improvement of post-acne marks in 4 weeks Dermatologist and allergy tested. Paraben free Non Comedogenic