The TSH (or Thyroid Stimulating Hormone) is the test that most doctors use to screen for hypothyroidism. But this test actually measures how well the pituitary is “talking” to the thyroid gland, rather than measuring actual thyroid hormones or, more importantly, the level of thyroid activity in the body . Patients are often frustrated because their TSH test results are “normal,” and their doctor tells them nothing is wrong. This standard testing does not catch 80% of patients who have low thyroid hormone levels.
The overwhelming majority of doctors and endocrinologists use Synthroid, which is the inactive thyroid hormone T4, and hope your body converts it to the active thyroid hormone T3. The problem is that the conversion of T4 (the storage hormone) to T3 (the active hormone) can be reduced in anyone with significant stress, depression, history of dieting, insulin resistance, obesity, diabetes, chronic fatigue syndrome, fibromyalgia, autoimmune disease, chronic inflammation, chronic infections, PMS, iron deficiency, and many more conditions. Thus, T3-containing preparations and straight time-released T3 is much more effective for the majority of people.
I customize T3/T4 thyroid replacement therapies for patients who just don't do well with T4-only replacement therapy. If you have been told that your numbers are "normal", but you don't feel "normal", then it's worth getting a second, or even a third opinion.
To your good health,