Your Metabolism and your Thyroid Your metabolism is literally the most vital part of you. When you take in food, metabolism is the process by which it is converted into energy that keeps your body ticking along. This process is controlled by a few all-important hormones (T4 and T3), and those hormones are created by the thyroid. The Thyroid Wrapped around your windpipe is a small... https://www.freedomfromdiabetes.org/blog/post/thyroid-causes-symptoms-and-treatment/2876