GLP1R and hyperinsulinism: (2014) demonstrated that under postprandial hyperglycemia and hyperinsulinemia (induced by a intraduodenal glucose infusion; 3 kcal/min) an intravenous infusion of GLP‐1 (0.9 pmol kg−1 min−1) increased blood flow in the superior mesenteric artery as measured by ultrasound/Doppler technique.