This investigation will examine the effects of consuming a structured, portion-controlled,
low-glycemic index diet (commercially available as the Nutrisystem-D program) on several
indicators of glycemic stability and variability among participants with type 2 diabetes.
Results on the portion-controlled diet will be compared with those on participants' usual
diets in a randomized cross-over trial. The investigators expect that participants will
exhibit greater glycemic stability (e.g., more time in euglycemic range) and less glycemic
variability (e.g., smaller mean amplitude of glycemic excursions) while consuming the
Nutrisystem D program, as compared with their usual diet.