INS and obesity due to melanocortin 4 receptor deficiency: It has been postulated that intrapancreatic amylase is the main component of the acini‐islet‐acinar axis—the reflex which down regulates insulin release, while gut and blood amylase exhibit anti‐incretin actions “per se.” Additionally, high but still physiological blood amylase activity coincide with physiological glucose homeostasis and a lack of obesity.