How does Bioderma Sebium Serum work?Bioderma Sebium Serum works to rapidly reduce spots, visible and enlarged pores, residual marks and limit their reappearance.It utilises precisely dosed active ingredients including salicylic acid to exfoliate the skin. It also contains Acetyl Glucosamine, a sugar derivative to help promote skin cell renewal. The inclusion of FLUIDACTIV™ technology biologically normalises the quallity of sebum to prevent the formation of new imperfections. Hyaluronic Acid helps keep skin hydrated, acting as a humectant. This serum has proven efficacy. The skin is moisturised and smoothed and skin appears clearer and smoother. After continuous usage, spots and residual marks are visibly reduced, pores are tightened and fine lines are reduced. Key Dermatological Ingredients in Bioderma Sebium Serum:Salicylic AcidHyaluronic AcidAcetyl Glucosamine FLUIDACTIV™ technology Key Benefits of Bioderma Sebium Serum:Light texture to penetrate the skin quicklyEnriched with Hyaluronic Acid, Salicylic Acid and Acetyl GlucosamineProvides 8 hour moisturisation High tolerance formula Tested under dermatological supervision Proven efficacy Excellent makeup baseHow to use Bioderma Sebium Serum:Can be used on its own or before a daily skincare product, at the first sign of spots. Can be applied morning and evening.Step 1: Cleanse the face.Step 2: Apply a few drops to the face and neck and lightly massage into the skin in circular motions until product is fully absorbed into the skin.