Lab

Free T3

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Free T3

Free T3 is the active thyroid hormone that drives your metabolism and energy production. Testing this hormone helps uncover issues that may be causing fatigue, weight changes, or low energy levels, even when other thyroid markers seem normal.

Thyroid

What to Expect

Panel is drawn at Quest Labs. Locations are available nationwide. Fasting is preferred for more accurate results.

Details

Biomarker(s) tested:

Free T3 (free triiodothyronine)

Note: This lab is also part of the Root Cause Panel

Results

The turnaround time for results and Root doctor insights is typically 3–4 weeks post-draw. Once ready, the Root team will upload them to your personal Root dashboard and alert you for viewing.

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Reviews

erica and kelsey
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We're a team of doctors and dietitians who solve hormone, gut, and autoimmune issues at the Root cause.

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