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Diagnosis
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Your doctor may perform two different blood tests to determine if you are suffering from pre-diabetes: the fasting blood glucose test and the oral glucose tolerance test.
The fasting blood glucose test determines what your blood glucose level is after an 8 hour fasting period. This test determines if your body successfully metabolizes the sugar ingested through the food you eat. If your blood glucose level is found to be abnormal, you may be suffering from what’s referred to as “impaired fasting glucose”. A normal FPG is less than 100 mg/dL (milligrams per deciliter), whereas people suffering from pre-diabetes have an FPG of 100 mg/dL – 125 mg/dL.
The oral glucose tolerance test is usually done within two hours after the fasting blood glucose test. For this test, you must drink a beverage containing a large amount of glucose and if after two hours of consuming the drink your glucose is found to be abnormal you suffer from what’s referred to as “impaired glucose tolerance”. A normal OGTT is under 140 mg/dL whereas a person suffering from pre-diabetes has an OGTT of 140mg/dL – 199 mg/dL.
Both of these tests are an accurate way to measure pre-diabetes as both impaired fasting glucose and impaired glucose tolerance are symptoms of pre-diabetes.
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