Engineered for demanding skin, La Roche-Posay Effaclar Acne Serum combines salicylic acid's proven exfoliating power with niacinamide to address breakouts and congestion at their source. This 30ml concentrate penetrates deep into pores to dissolve sebum buildup while strengthening the skin's natural defenses. The refined formula respects sensitive areas, delivering visible clarity without over-drying. Perfect for those seeking clinical efficacy paired with dermatological expertise.