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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.
TSH causes the thyroid gland to make 2 hormones which helps to control your bodyâs metabolism. These hormones are known as T3 and T4. TSH levels can help determine why the dysfunction is occurring, whether it is due to a damaged thyroid gland or a problem with the pituitary.he thyroids job is to produce thyroid hormones which is secreted into the blood and then carried to every tissue in the body. Deficiency of your thyroid levels can lead to various ailments. Listed below are a few that can cause concern. 1  Increased heart rate. 2  Weight loss or weight gain.