Triiodothyronine Free, FT3 Quest
This test measures the free amount of thyroid hormone T3 (triiodothyronine) in the blood. It can help identify potential thyroid disease.
What is this test?
The Free T3 Test measures the amount of free triiodothyronine (commonly referred to as T3) thyroid hormone in the blood. This test can assess thyroid function and help diagnose hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid). T3 is responsible for many important functions throughout the body, including metabolism, heart rate, growth and development, body temperature, and more.
Who is this test for?
This test is commonly recommended if you are experiencing symptoms of thyroid disease. It is also used to monitor treatment for those who have already been diagnosed with a thyroid disorder.