TOTAL TRIIODOTHYRONINE (T3)
What does TOTAL TRIIODOTHYRONINE (T3) measure?
This test measures total triiodothyronine (T3), a thyroid hormone present in the blood. It may be used along with other thyroid tests to help evaluate thyroid function and investigate suspected overactive or underactive thyroid activity. Total T3 includes both protein-bound and unbound hormone, so results are interpreted in clinical context and alongside related thyroid hormone measurements.
This overview is educational. Use the recorded preparation, sample and lab-partner details below for collection guidance, and confirm any missing information before collection.
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- To be confirmed
Preparation and specimen requirements can vary by test and laboratory. Follow the instructions shown for your selected partner and any advice from your healthcare professional.