resq'd are they going by blood test results or by your basal temperature? Blood tests really only tell you if your thyroid is working (or if you have Hashimoto's autoimmune disease). It can't tell you what is important, such as if the cells in your body are able to use the thyroid hormones it makes. If there is anything I've learned in my 20 years of thyroid research, it's that there is no "normal" with thyroid patients or blood test results. The thyroid is the body's metabolic gauge/furnace. If your body temperature is sub normal, your thyroid hormones are not being utilized whether you have a thyroid pumping out normal amounts or not. Most doctors know absolutely squat about thyroid issues, yet estimates are that 90% of Americans now suffer from hypothyroidism.
There are literally thousands of symptoms of hypothyroidism, most are treated as individual diseases and have chemical drugs tossed at them, here are a few: high/low blood pressure, depression, anxiety, anxiety attacks, migraines, fibro-chronic fatigue, hypertension, atherosclerosis, enlarged heart, allergies, chronic sinus problems and/or infection, dental decay, edema, dry heels, swollen upper and/or lower eyelids, diabetes, low vitamin d, dementia, muscle weakness, insomnia, the list is endless and big pharma always comes out the winner.
www.wilsonstemperaturesyndrome.com tells you how to take your basal temperature.
www.stopthethyroidmadness.com is a great starting point for research. And I just learned tonight that many folks taking natural thyroid hormone (Armor/Westthroid/Naturethroid, etc.) have had good success by taking it at bed time and supplementing with selenium, iodine and NAC.
I've posted here before about my thoughts that silica may also be low in thyroid folks, as those with obvious thyroid symptoms seem to be getting the best results from the DE. I notice I get enough energy to get things done when I take it, and I'm only taking a half teaspoon with water. I really need to remember to take it daily, but one big symptom of hypothyroid is memory loss, often severe, mimicking early onset of dementia/alzheimer's. I think everyone with hypoT symptoms should be taking DE.