Glucose tolerance sugar water did not finish need to re-take the test, the results of the current test is inaccurate. The full name of glucose tolerance is 75g oral glucose tolerance test, referred to as OGTT, the test should be carried out in the early morning on an empty stomach after 8 hours of no calorie intake, 75g of anhydrous glucose will be dissolved in 250-300ml of water, 5 minutes to drink, respectively, fasting, postprandial several time points for blood collection to check the level of blood glucose. Therefore, if the sugar water is not consumed, the glucose intake is less than 75g, which will interfere with the postprandial blood glucose examination, and for women with suspected diabetes or during pregnancy, they need to re-take the examination on another day. And after gastrointestinal surgery or gastrointestinal digestion and absorption disorders, should not be oral glucose can be used when intravenous glucose tolerance test.