There is usually no need to prepare your own cups for the glucose tolerance test, and the instruments are usually prepared by the hospital. Sugar water is provided by the hospital and it is necessary to fast the morning before the test. Glucose tolerance test means that fasting blood glucose is tested first, and then 75 grams of glucose solution is taken orally for 0.5 hours, 1 hour, 2 hours, and 3 hours to draw venous blood, which is sent to the Laboratory Department to test blood glucose. After the test, if the fasting blood sugar ≥ 7.0 mmol / L or glucose tolerance test after 2 hours of blood sugar ≥ 11.1 mmol / L, and have the typical “three more and one less” symptoms (more drinking, more urination, more food, weight loss), can be diagnosed as diabetes. The glucose tolerance test should be performed under the supervision of a physician.