Lipstatin is a pancreatic lipase inhibitor ( IC 50 =0.14 μM), whose structure is closely related to the known inhibitor, Esterastin. Lipstatin inhibits the absorption of triglycerides without affecting the absorption of oleic acid. Lipstatin has no inhibitory effects on other pancreatic enzymes , such as phospholipase A2 and trypsin (<200 μM) .