Request a Demo

Lab

Free T4

No reviews yet

Free T4

Free T4, or thyroxine, is a hormone made by the thyroid gland. It helps show how well your thyroid is working and can help identify conditions like an under-active thyroid (hypothyroidism) or an overactive thyroid (hyperthyroidism).

Thyroid

What to Expect

Root labs are drawn at Quest Labs available nationwide. Fasting is required for most labs. Please check for a location near you before purchasing.

Details

Biomarker(s) tested:

Free T4 (Thyroxine)

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.

No reviews yet

Reviews

You may also benefit from these products

zinc

Zinc

REBRANDING SALE! We’re making room for our new look. Save 20% at checkout with code REBRAND20.
$29.00
thyroid supplements

Thyroid Health Bundle

This is the perfect place to start if you are looking to optimize your thyroid function.
$119.00
Screening Thyroid Panel

Screening Thyroid Panel

TSH, T4 (free), T3 (free), Thyroid Peroxidase Antibodies
$45.00
Micronutrient Panel

Micronutrient Panel

Vitamin A (Retinol), Vitamin C, Vitamin E, B vitamin panel, Copper, Ferritin, RBC Mag, Chromium, Molybdenum, CoQ10, Vitamin D, Zinc, Omegacheck
$325.00