Re: TSH range source, and a few questions
The American Association of Clinical Endocrinologists is the organization that came up with the .3 - 3 guideline in 2002. They've since backtracked on that, saying that treatment wouldn't be necessary until 5+, which is disappointing. But since MDs never accepted the original guidelines, what's the use in finding what the current ones are?
The endo who confirmed my own "self-diagnosis" doesn't use TSH alone for diagnosis. She treats if there are thyroid antibodies (TPO and/or Tg), symptoms, and low-range thyroid hormones, no matter what TSH is. If there are symptoms, there are almost always low thyroid hormones - no matter how "normal" TSH appears. The fact is that antibodies quash the production of TSH, and that must be taken into account.
Don't forget the antibody tests!