Bun meal test before the examination fasting 8~10 hours, morning fasting blood test, then eat 2 two (100g) buns, eat within 10 minutes, from the first bite of the buns to start timing, respectively, before eating buns, 1 hour after eating buns, 2 hours synchronization of blood tests for blood glucose, C peptide. Bun meal test is one of the current diabetes screening methods, which can be used to assist in determining the function of the pancreatic islets. Normal people’s blood glucose value before meal should be between 3.9~6.1mmol/L, and blood glucose should be lower than 7.8mmol/L 2 hours after meal. If the blood glucose value is abnormal, it suggests that you may have diabetes. You should consult your doctor for precautions before doing the Bun Meal Test and follow the doctor’s instructions for preparation so as not to affect the test results.