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This information is for educational purposes only, to enable you to have a quality conversation with your doctor who is prescribing the tests and medications. Several additional considerations are required to design this panel for an individual.
The basic ideas are:
- by measuring just three parameters, Free T4, Free T3 and Reverse T3, there are 27 possible scenarios.
- If only T4 is adjusted, there are only two possible changes, up or down. If T3 and T4 can be adjusted, there are eight possible changes.
- TSH is a measure of pituitary function, not thyroid function. Therefore TSH is not utilized to assess the body’s need for thyroid hormone.
Proof of Components
rT3 blocks production of T3
Cortisol diverts T4 to rT3 rather than T3
Articles Supporting the Need for T3
For more information about the benefits and indications for T3, see Combined Thyroid T4-T3 Therapy