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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.
People with hypothyroidism who take thyroid hormone medicine usually notice: 1  Improved energy level. 2  Gradual weight loss (in people with severe hypothyroidism at the time of diagnosis). 3  Improved mood and mental function (thinking, memory).4  Improved pumping action of the heart and improved digestive tract function.eople with hypothyroidism who take thyroid hormone medicine usually notice: 1  Improved energy level. 2  Gradual weight loss (in people with severe hypothyroidism at the time of diagnosis). 3  Improved mood and mental function (thinking, memory). 4  Improved pumping action of the heart and improved digestive tract function.