KTRK-TV Houston-Stay on top of the latest breaking news, weather and traffic with the ABC13KTRK app. It's the information you need to know in an app that's fun and easy to use.
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.
The thyroid gland regulates the bodyâs metabolism, while parathyroid glands regulate calcium levels and have no effect on metabolism. Parathyroid Hormone. Parathyroid hormone (PTH) has a very powerful influence on the cells of your bones by causing them to release their calcium into the bloodstream.