Glucose tolerance tests are generally priced at $100~300, which can vary depending on the region, and the price will generally increase if insulin or C-peptide tests are also required. Glucose tolerance test, i.e. oral glucose tolerance test, is the basis for diagnosis of diabetes mellitus, and is generally priced at around $100~300, which may vary due to the inconsistency of the fee schedule in different regions. Oral glucose tolerance test is to take 75g of glucose dissolved in 250~300ml of water orally, and the blood glucose in the vein before taking, 30 minutes, 1 hour, 2 hours, and 3 hours after taking respectively. It is important to note that no calorie intake is allowed for 8-10 hours before the test, the sugar water needs to be consumed within 5-10 minutes, and no coffee, strong tea or other beverages are allowed during the test. Depending on the patient’s specific situation, the doctor may check the islet function or C-peptide release at the same time, then the price may be increased, the specific how to check, you can consult a specialized doctor. If the glucose tolerance test is abnormal, it is recommended to consult a doctor in time and follow the doctor’s instructions for treatment.