It is generally recommended that fasting blood glucose measurements be taken at 6 to 8 a.m. for accuracy. Fasting blood glucose requires the examinee to fast for 8~10 hours before the examination, and then measure the fasting blood glucose at 6~8am the next morning, at which time the measured blood glucose value is more accurate, if the measurement time is late, it may affect the accuracy of the fasting blood glucose measurement, so it is generally recommended to measure the fasting blood glucose at 6~8am in the morning to be more accurate. The normal range of fasting blood glucose is 3.9~6.1mmol/L, if it is higher than this normal range, it means that the fasting blood glucose is elevated. If you have abnormal fasting blood glucose values, it is recommended that you go to the hospital and let the doctor make a judgment based on your specific situation.