La Roche-Posay Effaclar Duo 40ml is a complete care which associates 4 active ingredients to act on the 2 main signs of the skins with imperfection: Niacinamid, Piroctone and the association LHA/Linoleic Acid.It has an anti-impeprfection action reinforced by Procerad, exclusive andi-marks active ingredient. This active ingredient acts upstream to prevent that imperfections leave red or brown marks.These active ingredients are associated to soothing and anti-irritative La Roche-Posay Thermal Water to reduce the rednesses.Results: Skin pores are cleansed. The imperfections, even the severe ones, disappear. Skin is clear, smooth. It is durably rebalanced to find the qualities of a healthy skin.