Bioderma Sébium Pore refiner 30 ml Excess sebum, stress, 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 Sébium Pore Refiner: this 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 Anti-oxidants preserve the skin's natural radiance.