Why glucose tolerance test

Various factors can affect the accuracy of the glucose tolerance test, including illness, activity level and certain medications. If you're being tested for gestational diabetes, your doctor will consider the results of each blood glucose test. If one of the results is higher than normal, you'll likely need to test again in four weeks. If two or more of the results are higher than normal, you'll be diagnosed with gestational diabetes. If you're diagnosed with gestational diabetes, you can prevent complications by carefully managing your blood glucose level throughout the rest of your pregnancy.

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Overview The glucose tolerance test, also known as the oral glucose tolerance test, measures your body's response to sugar glucose. Request an Appointment at Mayo Clinic. Share on: Facebook Twitter. Show references Glucose tests. Lab Tests Online. Accessed Jan. Taking blood from some people may be more difficult than from others.

Oral glucose tolerance test - non-pregnant; OGTT - non-pregnant; Diabetes - glucose tolerance test; Diabetic - glucose tolerance test. American Diabetes Association. Diabetes Care. PMID: pubmed. Mojica A, Weinstock RS. Philadelphia, PA: Elsevier; chap Sacks DB. Diabetes mellitus. In: Rifai N, ed. Editorial team. Glucose tolerance test - non-pregnant.

How the Test is Performed. The most common glucose tolerance test is the oral glucose tolerance test OGTT.

Before the test begins, a sample of blood will be taken. The test may take up to 3 hours. How to Prepare for the Test. Make sure you eat normally for several days before the test. Ask your health care provider if any of the medicines you take can affect the test results. How the Test will Feel. Drinking the glucose solution is similar to drinking very sweet soda.

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