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.
This slows the metabolic activity within the body. Hyperthyroidism (thyrotoxicosis) is the increased activity of the thyroid gland (overactive thyroid) resulting in an increase in the level of thyroid hormones circulating in the blood. This speeds up the metabolic activity within the body.