What is the Thyroid it and where is it? It is a gland which is shaped like a butterfly and located at the base of the neck just below where the Adam’s Apple is. You will see from the picture that each wing lies either side of the windpipe. What does the Thyroid do? The purpose of your thyroid gland is to make, store, and release thyroid hormones into your blood. These hormones, which are also referred to as T3 (liothyronine) and T4 (levothyroxine), affect almost every cell in your body, and help control your body’s functions. If you have too little thyroid hormone in your blood, your body slows down. This condition is called hypothyroidism. If you have too much thyroid hormone in yo...