Pioglitazone potassium (U 72107) is an orally active and selective agonist of peroxisome proliferator-activated receptor gamma (PPARγ). It demonstrates high affinity binding to the ligand-binding domain of PPARγ, with an EC50 of 0.93 μM and 0.99 μM for human and mouse PPARγ, respectively. Pioglitazone potassium has applications in diabetes research [2] [3] [4].