Blood glucose at 2.5 hours postprandial should belong to the random blood glucose category, which should be <11.1 mmol/L for normal people, and the non-fasting blood glucose target is <10.0 mmol/L for diabetic patients with type 1 and type 2. Under normal circumstances, the range of blood glucose corresponding to fasting is 3.9-6.1 mmol/L, 6.1-7.0 mmol/L belongs to impaired fasting blood glucose; the blood glucose value corresponding to one hour after meal is 6.7-9.4 mmol/L, and up to 11.1 mmol/L; the blood glucose value of two hours after meal should be <7.8 mmol/L, 7.8-11.1 mmol/L It belongs to impaired glucose tolerance. At present, the clinical testing of fasting blood glucose and 2-hour postprandial blood glucose is more frequent, and the 2.5-hour postprandial blood glucose testing is not usually carried out. If elevated blood glucose is found, retesting or timely endocrinology consultation can be conducted for further examination of fasting and 2-hour postprandial blood glucose or glucose tolerance test to clarify the diagnosis. If you feel unwell, consult the doctor promptly.