Thyroid Stimulating Hormone (TSH) tr IgGers the thyroid gland to make two hormones:- triiodothyronine (T3) and thyroxine (T4), and both of these help control the body's metabolism. This thyroid profile contains a series of blood tests generally used to measure how the thyroid glands are working. The thyroid gland is a small gland located in the lower- front part of the neck.