Starving yourself at night is generally not good for the recovery of pancreatic islet function; instead, it may also cause nocturnal hypoglycemia. In type 1 diabetes, pancreatic β-cells are constantly being destroyed, and pancreatic islet function cannot be restored. However, some newly diagnosed type 2 diabetes patients may recover their islet function through active lifestyle intervention and early insulin fortification. Starving at night is not good for the recovery of islet function. For diabetic patients who do not eat at night but are treated with hypoglycemic drugs, it is very likely to cause nocturnal hypoglycemic episodes, which can lead to changes in mental status, cognitive impairment, and even coma due to lack of sugar in brain tissue. Severe hypoglycemia that lasts more than 6 hours can lead to permanent, life-threatening brain damage. Patients diagnosed with diabetes should standardize their treatment under the guidance of a doctor, monitor their blood glucose regularly, and avoid hypoglycemia at the same time.