La Roche-Posay Effaclar Serum is a powerful, targeted treatment designed to address breakouts, visible pores, and early signs of aging in acne-prone skin. Formulated with a potent blend of salicylic acid, LHA, and glycolic acid, this serum works to deeply exfoliate and unclog pores, minimizing the appearance of imperfections and refining skin texture. Added niacinamide strengthens the skin barrier, while La Roche-Posay Thermal Spring Water soothes and reduces irritation. Clinically proven to reduce the visibility of blemishes, fine lines, and blackheads, Effaclar Ultra Concentrated Serum is ideal for use in the evening to leave skin clearer, smoother, and more refined over time.