Pore Perfecting & Refining Serum by Dr Dennis Gross has been developed to ward-off blackheads and reduce the appearance of dilated pores. A cocktail of pore refining acids; malic, citric, glycolic and lactic; Pore Perfecting & Refining Serum reduces congestion within the pores, loosening blockages and neautralising bacteria with the added anti-microbial benefit of Farnesol.