To study the effect of an ileocolonic formulation of ox bile extract on insulin sensitivity,
postprandial glycemia and incretin levels, gastric emptying, body weight and fasting serum
FGF-19 (fibroblast growth factor) levels in overweight or obese type 2 diabetic subjects on
therapy with DPP4 (dipeptidyl peptidase-4) inhibitors (e.g. sitagliptin) alone or in
combination with metformin.