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Four tests â thyroid-stimulating hormone (TSH), Free T3, Free T4 and thyroid antibodies â are required to accurately assess the function of the thyroid gland, our master gland of metabolism. An optimal TSH level should be less than 2.0, not the currently accepted 4.7 reported by most labs.
A 7-Step Plan to Boost Your Low Thyroid and Metabolism. A 7-Step Plan to Boost Your Low Thyroid and Metabolism. LOW THYROID FUNCTION was the topic of a recent blog. I covered how it affects more than 30 million women and 15 million men.