A patient who has just been prescribed an incretin enhancer, asks the nurse how it works. The nurse informs the patient that these types of medications:

A. Increase insulin production by the pancreas: This is incorrect because incretin enhancers don't increase the production of insulin itself but rather enhance the secretion of insulin in response to meals. B. Increase insulin secretion from the pancreas: This is correct. Incretin enhancers (e.g., DPP-4 inhibitors or GLP-1 receptor agonists) work by amplifying the effect of incretins, which are hormones that increase insulin secretion in response to meals. C. Decrease the amount of glucagon produced by the pancreas: This is partly true but not the primary mechanism. Incretins do reduce glucagon release, which helps lower blood glucose, but the main action is to increase insulin secretion. D. Decrease the uptake of glucose by the body's cells: This is incorrect. Incretin enhancers do not work by decreasing glucose uptake by cells; rather, they enhance insulin secretion which in turn helps cells to uptake glucose.