After, the study team will begin a hyperinsulinemic-euglycemic clamp procedure (a procedure to measure the body's sensitivity to insulin). During this procedure the study team will infuse insulin and glucose through the IV and will collect blood samples every 5 minutes for the duration of the procedure to monitor the subjects blood glucose and blood insulin concentrations. This procedure is designed to last 2 hours. The study team will change the infusion rate of glucose accordingly to ensure that the subjects blood sugar is maintained at a healthy/normal level. The study team will also infuse a small amount of potassium to make sure potassium concentrations remain at healthy/normal levels. About 30 minutes after starting this procedure to measure the body's sensitivity to insulin, the study team will collect another sample of muscle from the thigh and fat tissue from the area just underneath the skin near the belly button. After completing the hyperinsulinemic-euglycemic clamp procedure, subjects will be provided a meal, and the study team will continue to monitor the subjects blood glucose concentration until stable.