Glucose tolerance test results are varying. The greater level of the glucose means that you have diabetes or the gestational diabetes. However, the glucose tolerance test result is according to another medical problem. Glucose tolerance test preparation is simple. You only need to eat normally in several days before you take the glucose tolerance test. Well, you also should not eat or drink anything during 8 up to 10 hours before the glucose tolerance test and you cannot eat during the test. Having taken the test, you will not suffering from glucose tolerance test side effects because the test will not give you any side effects. Getting the glucose tolerance test is the best for you to check your glucose level.