The thyroid is a ductless gland located in the neck that is responsible for releasing hormones that control metabolism. It also regulates other body functions like breathing, heart rate, central and peripheral nervous systems, body weight, muscle strength, menstrual cycles, body temperature, cholesterol levels, and so much more. (Endocrine Web)
The thyroid uses iodine it sucks from the blood to make many hormones, but the two major ones are triiodothyronine and thyroxine. Too much of these hormones cause anxiety, irritability, nervousness, sweating, shaking, hair loss, and missed or light menstrual periods. Too little causes, insomnia, fatigue, difficulty concentrating, dry hair and skin, depression, sensitivity to cold, heavy periods, and joint or muscle pain.
Thyroid cancer is the most rapidly increasing cancer in the US. (American Cancer Society) Some health professionals blame the increase in thyroid cancer to the extra chemicals that are in processed foods. The thyroid just sucks up these chemicals with the iodine and all the toxicity causes cancer.