How do I interpret the results of the glucose tolerance test

The glucose tolerance test is a blood test used to check blood glucose levels to screen for gestational or type 2 diabetes. The test involves a period of fasting, then ingesting an amount of glucose. The blood glucose level is tested one or more times after the glucose has been ingested. An individual’s results are compared to the predicted numbers. If your glucose tolerance test results show a blood glucose level that is not in line with acceptable levels, it indicates the possibility of diabetes or other health problems. To prepare for the blood glucose test, the patient must maintain a normal diet and daily schedule for about a week before the test. He or she must therefore fast for at least eight hours immediately before the test. Furthermore, the patient should not drink anything during those eight hours Insulineresistentie.

How the test is administered depends on whether a person is being tested for type 2 diabetes or gestational diabetes. Testing for type 2 diabetes involves drawing blood once, two hours after the patient drank a sugary drink containing a measured amount of glucose. When testing for gestational diabetes, which is the type of diabetes that can occur during pregnancy, blood is drawn at least once and can be drawn multiple times over a period of hours after the glucose solution has been ingested.


To interpret the results of the glucose tolerance test, the results of the blood tests are compared with the levels considered to be within the normal range. Normal levels for a non-pregnant person are 140 mg / dL (milligrams per deciliter) and for a pregnant woman they are around 95 mg / dL. Two hours after drinking the solution, glucose tolerance test results should be below 200 mg / dL in the type 2 diabetes test and 155 mg / dL when screening for gestational diabetes. These values ​​may differ slightly between doctors or laboratories, but are generally considered to be good average results.

When glucose tolerance test results show above average numbers, it could be an indicator of diabetes, which requires further diagnostic tests. Glucose tolerance test results can also be affected by illness, stress, or medications. These factors also need to be considered when interpreting test results, as they can lead to abnormal levels even if no medical problems are present. Results above normal levels may also indicate other diseases besides diabetes, also requiring further diagnostic tests and a thorough review of the patient’s history.

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