The thyroid is a major player of the endocrine system. It’s a gland located on the front lower part of the neck, right above the Adam’s apple, in front of the voice box or “larynx.” It is responsible for overall maintenance of most bodily functions including metabolism, body temperature, heart rate, mood, and brain activity.
The thyroid maintains all of these functions through the production of two main hormones: thyroxine (T4) and triiodothyronine (T3). Both of these hormones are produced through the thyroid’s use of iodine. T4 and T3 float freely in the blood or bind to transport proteins to be carried to various organs throughout the body.
Since T3 and T4 are responsible for the maintenance of so many systems, it’s easy to see that abnormal levels of these hormones can create far-reaching consequences for the overall functioning of the body and its various systems.