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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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How Long Do You Have To Fast Prior To A Diabetes Blood Test ?

How long do you have to fast prior to a diabetes blood test ?
Sun, 20 Dec 2009
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  Anonymous's Response
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Standard rules dictate that in order that the sample to be "fasting", you must not have had anything to eat or drink from 8-12 hours. At least 8 hours, but not more than 12, or you run the risk of dehydration or fainting. Best to check with your doc or the lab where you will be doing the test.
Note: For further follow-up, discuss your blood glucose reports with our diabetologist. Click here.
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How Long Do You Have To Fast Prior To A Diabetes Blood Test ?

Standard rules dictate that in order that the sample to be "fasting", you must not have had anything to eat or drink from 8-12 hours. At least 8 hours, but not more than 12, or you run the risk of dehydration or fainting. Best to check with your doc or the lab where you will be doing the test.