One hour postprandial blood glucose 8.1mmol/L is normal. Under normal circumstances, the normal value of fasting blood glucose is 3.9-6.1mmol/L, generally half an hour to one hour after eating blood glucose reaches its peak, but should be less than 11.1mmol/L, three hours after the meal blood glucose to return to the fasting level, so the one hour postprandial blood glucose 8.1mmol / L is normal. One hour postprandial blood glucose can not be used to diagnose diabetes mellitus, you can improve the fasting blood glucose, 2 hours postprandial blood glucose, glucose tolerance test, glycated hemoglobin and so on to know whether there are blood sugar abnormalities. If there are blood sugar abnormalities, you should go to the hospital in time to further clarify the diagnosis and treatment under the guidance of the doctor.