La Roche-Posay Effaclar Serum is an ultra-concentrated anti-imperfection treatment designed for adult acne-prone skin. This powerful serum combines exfoliating acids with soothing ingredients to reduce blemishes, refine skin texture, and provide anti-aging benefits while being gentle enough for sensitive skin. The serum contains key active ingredients including salicylic acid, LHA, and glycolic acid that work together to unclog pores and promote cell renewal. It also features niacinamide to help limit bacterial growth and soothe irritation, along with La Roche-Posay Thermal Spring Water for its anti-inflammatory properties. For best results, apply in the evening to clean, dry skin. The formula is non-comedogenic and free from parabens, silicones and sulfates, making it suitable for sensitive, acne-prone skin.