Your thyroid gland is located at the front of your neck, kind of wrapped around your windpipe. It makes two main hormones, T3 and T4, which are made with iodine.
These hormones are like the master switches for your body’s metabolism.
They affect your breathing, heart rate, brain function, how you move, your sleep, and even how your digestive system works.
They also influence other glands in your body.
