The T3 (Triiodothyronine) test is a blood test that measures the level of triiodothyronine, an important thyroid hormone produced by the thyroid gland. T3 plays a key role in regulating the body’s metabolism, heart rate, body temperature, energy levels, and overall growth and development. This test helps evaluate how well the thyroid gland is functioning and whether hormone production is within the normal range.
This test is commonly recommended when a person experiences symptoms such as unexplained weight changes, fatigue, rapid heartbeat, nervousness, excessive sweating, hair loss, mood changes, or when a doctor suspects a thyroid disorder. It helps diagnose and monitor conditions such as hyperthyroidism, hypothyroidism, thyroid hormone imbalance, goiter, and other thyroid-related disorders. The T3 test is often performed along with other thyroid function tests such as T4 and TSH to provide a complete assessment of thyroid health and guide appropriate treatment when abnormalities are detected.
