T3 (Triiodothyronine), Free
This test measures the level of freely circulating triiodothyronine (T3) in the body. T3 is a hormone produced by the thyroid gland that helps regulate metabolism and body temperature. T3 is used to help diagnose thyroid disorders, especially hyperthyroidism (overactive thyroid). T3 is often evaluated after an abnormal TSH and/or T4 test.
Test results may take 1-2 business days.
Choose the test you want (be sure to pick the laboratory you want to use).
Pay by credit card or PayPal®.
You pay directly and we do not bill your insurance.
After purchasing your testing you will receive an email with your lab requisition. Bring this form to the laboratory.
If you have selected the option to have an At Home Test Kit delivered to you, you will receive your test kit in the mail within 5 to 7 business days. (Not all tests are available as At Home Test Kits.)
We’ll email you when your results are ready. Sign into your account to view and download your result reports.
Certain result values may prompt a phone call from our ordering provider to ensure the patient is aware of their result.
Triiodothyronine
Associated Categories
Frequently Ordered Together
Measures the amount of thyroid-stimulating hormone TSH, Free T3, Free T4, T3 Uptake, T4, T7, T3 Total and Thyroid Peroxidase Antibody (TPO).
Patients Ultimately Purchase
This comprehensive package combines over 50 tests, 128 key metrics reflecting heart, diabetes, liver, kidney, thyroid, hormone, cancer and nutritional health.
This comprehensive package combines over 50 tests, 128 key metrics reflecting heart, diabetes, liver, kidney, thyroid, hormone, cancer and nutritional health.
Measures the amount of thyroid-stimulating hormone TSH, Free T3, Free T4, T3 Uptake, T4, T7, T3 Total and Thyroid Peroxidase Antibody (TPO).
The Expanded Health Check includes additional heart, diabetes, liver, thyroid, hormone, cancer and vitamin testing: more than 90 critical health metrics.
The Expanded Health Check includes additional heart, diabetes, liver, thyroid, hormone, cancer and vitamin testing: more than 90 critical health metrics.
Measures the amount of thyroid-stimulating hormone (TSH), T3 uptake, T4, T7 and T3 Total.