----- Original Message -----
From: "Pam Beckman" <[log in to unmask]>
>
> My experience with estrogen replacement and thyroid was this:  When I
> started an oral HRT, it more than doubled my need for thryoid
> replacement.  I mentioned it to the Dr. I had then, and she had never
heard
> of such a connection.

An increase in Estrogen level elicits an increase in binding of thyroxine
(T4) to the carrier and binding proteins. So, less thyroid is available in
free form. This maybe demonstrated using Total T4 Assay, T3 Resin Uptake and
FTI (Free Thyroxine Index).

Greg




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