The results of glucose tolerance are usually available on the same day. The test is usually started early in the morning when the patient is fasting, and the result will be available on the same day. The process of glucose tolerance test is as follows: fasting after fasting for at least 8~10 hours, usually early in the morning, when fasting, the first blood collection for fasting blood glucose test, then take 75g of anhydrous glucose (dissolved in 250~300ml of water, drink it in 5 minutes), after the start of glucose water, respectively, to determine the blood glucose after 0.5 hours, 1 hour, 2 hours, 3 hours. Therefore, the glucose tolerance test starts early in the morning and the results are usually available on the day of the test. If abnormal blood glucose levels occur, it is recommended to seek prompt medical attention. It is recommended to consult your doctor for more information on the precautions to be taken for glucose tolerance test.