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deT notsuH  
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 More options May 30 2001, 12:35 pm
Newsgroups: alt.support.thyroid
From: deT notsuH <pcird*BACKWARDS*@hcimu*BACKWARDS*.ude*BACKWARDS*>
Date: Wed, 30 May 2001 12:30:01 -0400
Local: Wed, May 30 2001 12:30 pm
Subject: Re: fasting TSH?
There must be something else being tested at the same time or another reason
for "fasting".  TSH is sensitive to time of day, but not to dietary factors.
If it is just TSH (why, by the way? since a measure of esp fT4 is far superior
in thyroid testing land) rather than "fasting", a better guide would have been
to suggest that you get the TSH test done always at the same time of day, and
under the same conditions (such as BEFORE you take any thyroid hormones for
the day) so that you are comparing apples with apples from test to test.  
Perhaps this was simply his way of saying that without actually saying it(??).

OldMaidFan wrote:
> In 7 years on Synthroid, I've never to been told to having a "fasting" TSH.
> Now on the lab form, the doctor has written a note that I need to have a
> fasting TSH in 3 months.  Anyone know how the results would be any different
> than the usual test.  I know it's common to fast for a cholesterol test, but
> I'm interested to know if any of you fast for a TSH....

--
deT notsuH        bass-ackwards: ude.hcimu@pcird
If at first you don't succeed, redefine success.

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