Bioderma Sebium Pore Refiner tightens pores, smoothes and refines skin texture. Excess sebum, stress, tobacco, pollution - there are countless factors that cause your pores to become dilated and distorted. An expert in cutaneous biology, Bioderma research has innovated and created Sebium Pore Refiner with its correcting concentrate improves the skin's appearance. Its texture becomes finer, more regular and clearer, and pores are tightened and less visible. The Fluidactiv exclusive patented complex biologically regulates sebum quality, which keeps pores from becoming clogged and limits the formation of blemishes. Agaric acid, a powerful astringent, tightens pores and refines the skin texture and the anti-oxidants preserve the skin's natural radiance.