A one hour postprandial blood glucose of 12.5 mmol/L and a two hour postprandial blood glucose of 11 mmol/L after taking metformin is required for treatment. Normal one hour postprandial blood glucose should generally be less than 11.1 mmol/L and two hours postprandial blood glucose should be less than 7.8 mmol/L; for diabetic patients, a non-fasting blood glucose of less than 10 mmol/l is recommended.A one hour postprandial blood glucose of 12.5 mmol/L and two hours postprandial blood glucose of 11 mmol/L after metformin requires treatment in both normal and diabetic patients. Such patients should maintain their blood glucose level through dietary control, such as controlling total calorie intake, maintaining a low-salt, low-sugar, low-fat diet and appropriate exercise; if the blood glucose remains poorly controlled after taking metformin through lifestyle interventions, the dosage of the medication should be adjusted or the type of medication should be increased under the guidance of a doctor. If the blood glucose level is 12.5mmol/L one hour after meal and 11mmol/L two hours after meal after taking metformin cannot be relieved by lifestyle intervention, it is recommended to go to the hospital for consultation.