The normal range of blood glucose at age 85, fasting blood glucose is 3.9~6.1mmol/l. 2 hours postprandial blood glucose is less than 7.8mmol/l. However, the following situations need to be noted: When fasting blood glucose is greater than or equal to 6.1mmol/l but less than 7.0mmol/l and 2 hours after glycemic load blood glucose is less than 7.8mmol/l, suggesting impaired fasting blood glucose. When fasting blood glucose is less than 7.0 mmol/l but 2-hour post glycemic load blood glucose is greater than or equal to 7.8 mmol/l and less than 11.1 mmol/l, it suggests impaired glucose tolerance. Both of these conditions are classified as pre-diabetes. These two cases can be temporarily without medication, you can control the diet, strengthen the exercise, regular monitoring of blood glucose, according to the blood glucose situation in a timely manner to seek medical attention. If the fasting blood glucose is greater than or equal to 7.0mmol/l or 2 hours after meal blood glucose is greater than or equal to 11.1mmol/l, it is recommended to go to the endocrinology department of the hospital in time to do the glucose tolerance test and glycated hemoglobin, etc., to make a clear diagnosis.