Signs of improved islet function include stabilization of blood glucose and reduction in the dose of glucose-lowering medication. Changes in pancreatic islet function can also be clarified by laboratory testing of insulin or C-peptide values. Normal pancreatic islet function shows that the body can secrete a large amount of insulin to lower blood glucose half an hour after a meal, and when fasting or starving, the release of insulin decreases accordingly to maintain the blood glucose level from dropping excessively. Improved pancreatic islet function is characterized by good and stable blood glucose control, without dramatic fluctuations in blood glucose; the dose of hypoglycemic drugs required is reduced, and a relatively small amount of hypoglycemic drugs can bring blood glucose under control. Patients with abnormal pancreatic islet function or abnormal blood glucose should go to the hospital and be treated under a doctor’s supervision.