Orlistat, used in obesity research, is a pancreatic lipase inhibitor that acts locally in the gastrointestinal tract to inhibit lipase. More detailed experiments show that gradually THL affects the retinoblastoma protein pathway and leads to cell-cycle arrest at G1/S boundary. Lipase Inhibitor, THL is an inhibitor of pancreatic and gastric lipase, as well as carboxyl ester lipase (CEL) and diacylglycerol lipase-α (DAGLα). Lipase Inhibitor, THL also activates caspase-3.