La Roche-Posay Effaclar DUO+M is a targeted anti-blemish serum with salicylic acid that unclogs pores and reduces blackheads and whiteheads. Clinically shown to deliver visible results in as little as 8 hours, this expert acne treatment is formulated for oily and sensitive acne-prone skin. The 40 ml (1.35 fl. oz.) tube provides a concentrated serum texture that absorbs quickly without leaving a greasy residue. It helps control excess oil production, fade post-acne marks and discoloration, and refine overall skin texture for a clearer, smoother complexion. In a 4-week clinical study, users experienced approximately 44% fewer blemishes and approximately 66% fewer blackheads. The formula is non-comedogenic, dermatologically tested, and free from ingredients that block pores, making it appropriate for daily use on sensitive skin. Suitable for adult skin types prone to recurring breakouts, enlarged pores, and post-acne scarring.