http://www.holtorfmed.com/index.php?...ads&file_id=12 This study of 403 men investigated the association between TSH, T4, free T4, T3, TBG and reverse T3 (rT3) and parameters of physical functioning. This study demonstrates that TSH and/or T4 levels are poor indicators of tissue thyroid levels and thus, in a large percentage of patients, cannot be used to determine whether a person is euthyroid (normal thyroid levels) at the tissue level. ...
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