Repost of questions. It doesnt look like first post worked?
Please if anyone has general info on hyopothyroidism and more specifically,
1. Are there indivdual variations in what would be considered
'normal'values? ie. low normal T4  being clinically too low - ie person
used to a higher normal with decreased T4 yet still in normal range, but
with clinical s/s?

2. What about clinical value of low T4 but normal tsh? Is there reasons
for this- ie can tsh be blunted- and would this be a temporary thing? or
need treatment?  ( assuming pt is not on any other medications)

I would appreciate any info or direction to references. Thank you.

  1. Are there

I believe that this is entirely possible. The range for a
normal T4 is very wide and I have found that I need to be in
the upper range to feel "right". I think you need to try to
feel like you did before you were hypothyroid, not get your T4
in the clinically normal range.

A low T4 with a normal TSH can be just a matter of a lab value,
you need to specify how far from normal the T4 was and how
normal the TSH was for me to be more specific.
There are other possible causes which would require evaluation
by an endocrinologist.
Primary hypothyroidism is defined by a high TSH and
hypothyroidism. There are other causes for hypothryoidism.

Laurie
PS You should be able to find medical info at a library.

On a copy if a {*filter*} count, it says the normal range for
T4  is 4.5-12.0 UB/DL   and for
TSH is 0.3-5.0  IU/ML