La Roche-Posay Effaclar Ultra Concentrated Serum 30ml is an anti-imperfections and anti-marks serum for daily peeling.It is formulated with a complex of 3 ultra-concentrated complementary acids, combined with soothing niacinamide :the salicylic acid unclogs and tightens the pores,LHA gently smoothes the surface of the skin,glycolic acid improves skin renewal.Absorption is fast and the finish is non-sticky.