The FT4 (Free Thyroxine) Test measures the level of free thyroxine, a thyroid hormone that is not bound to proteins in the blood. This test is essential for evaluating thyroid function and diagnosing disorders such as hypothyroidism (underactive thyroid) and hyperthyroidism (overactive thyroid), as free thyroxine plays a crucial role in regulating metabolism, energy levels, and overall health. The test involves drawing a blood sample, which is then analyzed in a laboratory to determine the concentration of free thyroxine.
Typically, the FT4 test is performed once if there is a suspicion of thyroid dysfunction. If you are undergoing treatment or monitoring a thyroid condition, your healthcare provider may recommend repeating the test periodically. Depending on the results, follow-up tests or additional thyroid function assessments, such as TSH, may also be suggested by your healthcare provider.
Fasting: Not required.
Sample Type: Blood sample.
Preparation: No specific preparation is needed. However, inform your healthcare provider about any medications or supplements you are taking, as certain drugs can affect FT4 levels.
Timing: The test can be done at any time of the day.
Quickly book medical tests and hassle-free appointments with top providers through Hati Health. Our healthcare booking service lets you easily find and book ultrasounds, lab tests, and screenings in just a few clicks—no complicated processes, just fast and simple booking.
Get fast-track medical tests and priority bookings with trusted healthcare providers. With Hati Health, you can quickly schedule your next medical screening or diagnostic test without long wait times, ensuring convenient and reliable healthcare at your fingertips.
Find fixed-price medical screenings with clear, upfront costs—no surprises or hidden fees. Hati Health lets you compare providers, see prices before booking, and secure an appointment with ease, making healthcare scheduling affordable, simple, and stress-free even without an HMO.
209 J.P. Laurel Avenue, Bajada, Poblacion District, Davao City, Davao del Sur, Philippines