A well recognized and troublesome feature of diabetes management is the exacerbated post prandial glucose elevations following a typical high fat meal. To date the mechanisms driving this increased post prandial glycemia are unclear. Pramlintide is believed to affect intermediary metabolism as well as nutrient absorption. The relative contributions from altered absorption and metabolism to the observed post prandial reductions in plasma glucose and TG concentrations remain uncertain, however. Combinations of radioactive and stable isotope labeling techniques are able to quantify the relevant fluxes of glucose and lipids in vivo in humans and are therefore able to provide quantitative answers to these questions.