La Roche-Posay Effaclar Ultra Concentrate Serum is a powerful, multi-action formula designed for blemish-prone skin. This best-selling serum visibly clarifies the complexion while gently exfoliating to decongest pores and remove dead skin cells. Formulated with salicylic acid, glycolic acid, and lipo-hydroxy acid, the concentrated serum works to refine skin texture, reduce imperfections, and promote smoother, clearer skin. Enriched with La Roche-Posay's Thermal Spring Water and niacinamide, this serum soothes, brightens, and delivers a mattified finish, helping to control excess shine. Perfect for those seeking clearer, more balanced skin.