Overreliance on TSH is a thyroid therapy policy that fails to detect its own failure

In standard T4 thyroid therapy, TSH normalization is so easy to achieve that it is almost impossible to fail. First, TSH out of range is the judge of an initial DIAGNOSIS. Next, normal TSH becomes the sole TARGET of therapy. Finally, normal TSH becomes the sole JUDGE of therapy success. This is faulty reasoning. There …

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