Joachim Geyer studied nutrition science in Giessen/Germany, and obtained his doctoral degree in membrane transporter research. He completed his habilitation in veterinary pharmacology and pharmacogenetics and is currently a full professor and acting director at the Institute of Pharmacology and Toxicology of the Justus Liebig University Giessen. His research focus is on carriers of the Solute Carrier Family SLC10, including the bile acid transporters NTCP and ASBT, the steroid sulfate transporter SOAT, and some others (SLC10A4, SLC10A5, SLC10A7). In addition, he is a specialist in veterinary pharmacogenetics, with a particular interest in the MDR1 (ABCB1) mutation in dogs and cats.