The 2-hour postprandial blood glucose of 8.5mmol/L is high and abnormal for normal people; it is within the target range and normal for diabetic patients. 1. The normal value of 2-hour postprandial blood glucose for normal people is below 7.8mmol/L. Therefore, a high 2-hour postprandial blood glucose of 8.5mmol/L may be caused by eating too many sweets or high-calorie foods, or it may be caused by diabetes or infections, etc. It is recommended that you consult with a medical professional for a clear diagnosis. 2. For patients who have been diagnosed with diabetes in the past, generally the 2-hour postprandial blood glucose needs to be controlled below 10mmol/L, so the 2-hour postprandial blood glucose of 8.5mmol/L has reached the control target, and you can continue with the current treatment program. Once an increase in blood glucose level is detected, it is recommended to consult a doctor in a timely manner.