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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.
Currently, the contribution of these metabolic pathways to thyroid hormone metabolism is not clear in humans; however, the current associations in animal models will be discussed. Scroll down to page 320 (15 of 28) for: Nutrients with Potential Influence on Thyroid Hormone Metabolism.