<qa>  What is the insulinotropic peptide that is dependent on glucose?Multiple studies have measured the baseline and stimulated levels of circulating gut hormones after RYGB in obese subjects. Elevated levels of GLP-1 and PYY and reduced levels of ghrelin have been reported in most studies, and variable results have been found for glucose-dependent insulinotropic peptide GIP, cholecystokinin CCK and pancreatic polypeptide PP. 