Total Thyroxine (T4) FIA

The Total Thyroxine (T4) test is a vital diagnostic tool used to evaluate how well your thyroid gland is functioning and to help diagnose disorders like hyperthyroidism (overactive thyroid) or hypothyroidism (under-active thyroid). By measuring the total amount of T4 hormone circulating in your blood—both the portion bound to proteins and the free portion—this test provides a clear snapshot of your metabolic health. It is particularly helpful for monitoring the effectiveness of thyroid replacement therapy or for investigating the root cause of symptoms like unexplained weight changes, heart palpitations, or chronic fatigue, allowing for precise adjustments to treatment plans.