They do not test thyroid properly. The proper test is for free T3, free T4, thyroid antibodies... TSH is actually a pituitary hormone and is irrelevant despite the fact that it is the gold standard of testing. My TSH was always normal, but when my environmental illness Dr. finally ran a full thyroid panel, I had virtually no T3, the active form of thyroid hormone.
I have been on 55 mcg twice a day of time released liothyronine since 2007. Since I have been following Dr. Lyn's recommendation of nebulizing a mixture of glutathione/nano zeolite/nano silver, I suddenly went hyper. In a panic, I had to make a consult with my naturopathic doctor in the United States, explained my symptoms of loose stools, weight loss, insomnia, jitteriness, I have to reduce my medication until I can get some more testing done. My ND said that my liver is kicking in and converting T4 to T3 and it is making me hyper. That has been my difficulty, converting T4 (mainly done in the liver). I flunked my liver detoxification profile back in the year 2000, it was so polluted I could not get rid of xenobiotics including aspirin! So I am now assuming that this nebulizing is very effective. Glutathione is your main liver detox element... while going hyper is extremely uncomfortable, I believe it is a good sign for my overall health. When people say they do not have thyroid problems, I often ask whether they have had a full thyroid panel, and it seems to be very uncommon.