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What do the results from an oral glucose tolerance test mean?

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Your blood glucose level should rise after you finish the sugary drink. Then it should go back to normal, as insulin moves glucose into your cells. If your blood sugar takes a long time to go back to normal, you could have diabetes. You might see a measurement from the test written out as “mg/dL.” It stands for milligrams per deciliter. Two hours after you finish the glucose drink, this is what your results mean:

  • Below 140 mg/dL: normal blood sugar
  • Between 140 and 199: impaired glucose tolerance, or prediabetes
  • 200 or higher: diabetes

SOURCES:  

American Academy of Family Physicians: "Diabetes."

American Association for Clinical Chemistry: "Glucose Tests."

American Diabetes Association: "Diagnosing Diabetes and Learning About Prediabetes," "How to Treat Gestational Diabetes."

CDC: "Oral Glucose Tolerance Test (OGTT) Procedures Manual."

Cleveland Clinic: "Oral glucose tolerance test during pregnancy."

Dartmouth-Hitchcock: "Oral Glucose Tolerance Test."

National Institute of Diabetes and Digestive and Kidney Diseases: "Step 1: Learn About Diabetes."

PubMed Health: "Glucose tolerance tests: What exactly do they involve?"

St. Joseph-Mercy Hospital: "Preparing for the Oral Glucose Tolerance Test (Adults)."

Mayo Clinic, “Glucose tolerance test,” “Triglycerides, why do they matter?” . Polycystic ovary syndrome (PCOS)

Johns Hopkins Medicine, “What is the pancreas?”

Reviewed by Michael Dansinger on November 14, 2018

SOURCES:  

American Academy of Family Physicians: "Diabetes."

American Association for Clinical Chemistry: "Glucose Tests."

American Diabetes Association: "Diagnosing Diabetes and Learning About Prediabetes," "How to Treat Gestational Diabetes."

CDC: "Oral Glucose Tolerance Test (OGTT) Procedures Manual."

Cleveland Clinic: "Oral glucose tolerance test during pregnancy."

Dartmouth-Hitchcock: "Oral Glucose Tolerance Test."

National Institute of Diabetes and Digestive and Kidney Diseases: "Step 1: Learn About Diabetes."

PubMed Health: "Glucose tolerance tests: What exactly do they involve?"

St. Joseph-Mercy Hospital: "Preparing for the Oral Glucose Tolerance Test (Adults)."

Mayo Clinic, “Glucose tolerance test,” “Triglycerides, why do they matter?” . Polycystic ovary syndrome (PCOS)

Johns Hopkins Medicine, “What is the pancreas?”

Reviewed by Michael Dansinger on November 14, 2018

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What are four things someone with diabetes should do every day?

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