The glucose tolerance test must be fasted for 8 to 10 hours, and eating will affect the blood glucose measurement results. If you are hungry before 12 o’clock, you can eat a light diet such as rice, fruits, milk, etc. appropriately, but after 12 o’clock, you must strictly fast.
Glucose tolerance test is a test method to diagnose diabetes, which can determine the function of pancreatic β-cells and their ability to regulate blood glucose through the test results. The specific test method is: first, draw venous blood once on an empty stomach, then dissolve 75 grams of anhydrous glucose in 300 milliliters of water and drink it, and then measure the blood glucose level and insulin level half an hour, one hour, two hours and three hours after drinking the glucose water.
You are not allowed to eat or drink between each blood draw during the glucose tolerance test, otherwise the accuracy of the results will be affected. When measuring fasting blood glucose, it is required to fast for 8-10 hours the night before; the daily carbohydrates should not be less than 150g for three days before the test; some drugs that affect the results such as birth control pills and diuretics should be stopped before the test, and they need to be stopped for 3-7 days if the condition permits.
Drinking sugar water during the glucose tolerance test requires that you drink it in 5 minutes, do not smoke or drink alcohol after drinking sugar water, do not drink coffee or tea, and do not do strenuous exercise in order to ensure the accuracy of the glucose tolerance test.
If you have abnormal glucose tolerance, you should go to the hospital to have the cause clarified and treated under the doctor’s guidance.