Driven by ecobiology, Bioderma's Research has developed Sebium Serum, the 1st anti-imperfections & signs of aging ecobiological serum. The complementary action of precisely dosed active ingredients (Salicylic Acid, Acetyl Glucosamine, Hyaluronic acid) & the Technology FLUIDACTIVTM act immediately on the visible signs & the root causes of acne-prone adult skin. Anti-imperfections: Salicylic acid exfoliates the skin on surface to quickly reduce pimples while the Fluidactiv Technology biologically prevents sebum oxidation & thus the appearance of new imperfections. Anti-marks: Salicylic acid acts on surface to renew the skin, while Acetyl Glucosamine, a biomimetic sugar derivative, naturally present in the skin, biologically promotes cell renewal from within. Smoothing effect: Hyaluronic acid, biomimetic, hydrates the skin surface while Acetyl Glucosamine boosts the internal skin hyaluronic acid synthesis to reduce fine lines long-lastingly. How To Use Apply the serum daily after cleansing.