Progress Your Health Podcast

Triiodothyronine also is known as T3 is the active form of thyroid hormone.  T4 also known as thyroxine is made in the thyroid gland.  T4 is then sent peripherally through the system, and mainly the liver will convert T4 to T3.  You can have all the T4 in your body, but if your T3 is low, then you will have symptoms of low thyroid.     If suspecting a case of low thyroid, thyroid disease, hypo or hyperthyroid your conventional doctor is going to run a TSH blood test.  The TSH (Thyroid Stimulating Hormone) is a signal from the brain monitoring thyroid disease and the thyroid levels in the body.   To put it simple:   If the thyroid levels are high, then the TSH is low.   If your thyroid levels are low, then TSH is high. As mentioned above the thyroid mainly makes T4, which is released into the blood and will travel in the body and be converted to the active form of thyroid, T3.  Approximately 60% of this conversion occurs in the liver, about 20% is converted by gut flora and about 20% is converted by periphe