GHRL and gastroparesis: These hormones, also known as brain-gut peptides, dominantly including gastrin, motilin, Ghrelin, cholecystokinin, vasoactive intestinal peptide, glucagon-like peptide-1 (GLP-1), etc. Among them, ghrelin and motilin agonists are being investigated as potential targets for the treatment of gastroparesis (Sanger and Furness, 2016).