Morning blood glucose measurements are usually taken between 6:00 a.m. and 8:00 a.m. It is recommended that you follow your doctor’s advice on how to measure your blood glucose. Morning blood glucose measurement is usually fasting blood glucose, which refers to the value of blood glucose tested before breakfast after an overnight fast (at least 8 to 10 hours without any food, except drinking water). This value reflects the function of pancreatic islet B cells, suggesting basal insulin secretion, and is the most commonly used test for diagnosing diabetes. Under physiological conditions, blood glucose levels will rise temporarily after eating due to the absorption of large amounts of glucose into the blood, and basically return to normal levels after 2 hours. It is more accurate to collect blood at 6:00 to 8:00 a.m. for breakfast, which is usually about 8 to 10 hours after the last meal of the previous day, which can be in a fasting state. Patients who need to measure blood glucose are advised to follow their doctor’s instructions.