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Fasting vs non-fasting blood tests
Old 08-28-2009, 08:39 PM   #1
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Fasting vs non-fasting blood tests

I'm trying to requalify for a lower premium life insurance policy which means
I have to submit to a blood test that a visiting nurse extracts. They told me
I don't have to fast . I'm used to fasting for my annual physical but now
can't remember which tests are affected by fasting and which aren't.
They also want a urine there a fasting/non-fasting effect on
test for that?

For some reason, my doctor hasn't required urine samples for many yrs, just blood. What tests need urine samples ?

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Old 08-28-2009, 08:49 PM   #2
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Urine samples for drug testing, as well as for glucose in the urine (you don't want that to be happening) I imagine.

Seems they would want a fasting test if they were interested in cholesterol, blood glucose, or A1c. Wouldn't need to fast if they were looking for CRP, liver function and kidney function, I don't think.

You might want to ask what they are looking for.


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Old 08-28-2009, 08:58 PM   #3
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LDL cholesterol, triglycerides, and glucose are the major tests requiring fasting. The urine sample is to check for drug metabolites including cocaine, among other things. Routine urinalysis is not necessarily a recommended test in healthy patients for screening purposes.
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Old 08-28-2009, 09:17 PM   #4
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Thanks, Rich and Rambler. Think I'll try to get an AM appt and fast.
For free labs, might as well get an accurate result.
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