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What do my oral glucose tolerance test results mean?

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First, you'll take the fasting glucose test. Then you'll drink a sugary solution. Two hours after that, you'll take another blood test. The results are:

  • Normal, if your blood sugar is less than 140 after the second test
  • Prediabetes, if your blood sugar is 140-199 after the second test
  • Diabetes, if your blood sugar is 200 or higher after the second test

SOURCES:

American Diabetes Association: "Prediabetes;" "How to Prevent Prediabetes;" "How to Tell if You Have Prediabetes;" and "Diabetes Mellitus and Exercise: Position Statement."

National Diabetes Education Project: "About Diabetes and Prediabetes."

National Library of Medicine: "Diabetes."

National Diabetes Information Clearinghouse (NDIC): "Prediabetes: Impaired Glucose Tolerance and Impaired Fasting Glucose" and "Prevention or Delay of Diabetes."

MedicineNet.com: "Diabetes: Preventing Type 2 Diabetes."

Labtestsonline.org: "Diabetes."

CDC: "Diabetes Latest."

Reviewed by Michael Dansinger on October 20, 2016

SOURCES:

American Diabetes Association: "Prediabetes;" "How to Prevent Prediabetes;" "How to Tell if You Have Prediabetes;" and "Diabetes Mellitus and Exercise: Position Statement."

National Diabetes Education Project: "About Diabetes and Prediabetes."

National Library of Medicine: "Diabetes."

National Diabetes Information Clearinghouse (NDIC): "Prediabetes: Impaired Glucose Tolerance and Impaired Fasting Glucose" and "Prevention or Delay of Diabetes."

MedicineNet.com: "Diabetes: Preventing Type 2 Diabetes."

Labtestsonline.org: "Diabetes."

CDC: "Diabetes Latest."

Reviewed by Michael Dansinger on October 20, 2016

NEXT QUESTION:

What do my hemoglobin A1C (or average blood sugar) test results mean?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

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