Reverse T3 Dominance TestingReverse T3 Dominance? If you suspect you have a sluggish or under active thyroid it is recommended that ask your health practitioner to perform a comprehensive thyroid function test. This includes measuring Thyroid Stimulating Hormone (TSH), free T4, free T3 and reverse T3. This will assist an accurate diagnosis of actual thyroid function. Currently most doctors only test (TSH) levels due to restraints within the current medical model. You may be told that your thyroid function is normal when TSH levels are within an acceptable range. Unfortunately having normal TSH levels does not automatically rule out a hypothyroid condition. A single test of Thyroid Stimulating Hormone (TSH) does not reflect how much T4 and T3 is being produced. In addition, it does not assess how well T4 is converting to the active T3 form. In fact, it may not be converting at all, it may be converting to the inactive form of T3 called reverse T3 (rT3). A test for rT3 will identify high levels of the inactive form of T3. Under normal conditions T4 will convert to both T3 and rT3 and the body quickly eliminates rT3. When T4 converts to rT3 it leads to the common symptoms of hypothyroidism. A measurement of rT3 is valuable in identifying a condition called Reverse T3 Dominance. This is a common hypothyroid condition.
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