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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 You Have To Fast Before Blood Test?

how long must i 'fast' before taking a blood test?
Thu, 17 Dec 2009
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If you are talking about a blood sugar test then you are supposed to stop eating and drinking the night before the test. If you are talking in secret code about a drug test then you should probably "fast" about 3-4 weeks.
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How Long You Have To Fast Before Blood Test?

If you are talking about a blood sugar test then you are supposed to stop eating and drinking the night before the test. If you are talking in secret code about a drug test then you should probably fast about 3-4 weeks.