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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.
Your body's metabolism depends on the amount of certain hormones in your body. The thyroid gland is located in the neck, and when active, it releases thyroid hormone that boosts the metabolism and also regulates body temperature.However, when the thyroid gland stops releasing thyroid hormone, the metabolism slows down, which causes fatigue and often weight gain.xercise boosts the thyroid function both during and also hours after exercise. However, without consistent exercise, the thyroid may continue to stop producing as much of this metabolism-boosting hormone.