The Tri-iodothyronine (T3) test can determine whether if the thyroid gland is functioning properly. Usually a T3 test can help diagnose hyperthyroidism and may be ordered to help monitor the progress of a patient with a known thyroid disorder.
A significant deviation from the normal range may require further evaluation by your physician.
Tri-iodothyronine Free, Serum (FT3)
This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H or coenzyme R). It is recommended to stop biotin consumption at least 72 hours prior to the collection of specimen. Estimated turnaround for results is 3 business days. If confirmation testing is required, the estimated time may be extended.