The presence of TPO antibodies in your blood suggests that the cause of thyroid disease is an autoimmune disorder, such as Hashimoto's disease
Triiodothyronine, known as T3 is another hormone produce by your thyroid. Most of the T3 in your body binds to protein and regulates your body's temperature, metabolism, and heart rate.
Thyroxine (T4) is the main hormone secreted into the bloodstream by the thyroid gland.
TSH is a hormone produce by your brain that stimulates the thyroid gland