Measures free T3 levels, essential for understanding thyroid function.
$14.99
Start testing your BiomarkersT3, Free measures the unbound fraction of triiodothyronine (Free T3), the biologically active thyroid hormone that directly influences cellular metabolism, energy production, and thermogenesis. Free T3 helps clarify thyroid functional status when TSH and free T4 are discordant and is important for evaluating symptoms of altered energy, weight regulation, and heat/cold intolerance. Because Free T3 reflects peripheral conversion and active hormone availability, it can guide more targeted thyroid interventions.
Select a core panel or build a fully customized lab plan based on your health goals and concerns.
Schedule your appointment at a nearby certified lab location. Most visits take just a few minutes.
Receive a detailed report with expert insights, actionable recommendations, and optional 1:1 guidance.
Track progress, retest when needed, and adjust your plan to continuously improve your well-being.
Foundation for a full basic health picture.
Deeper metabolic and nutritional insights.
Comprehensive testing for lifelong health.
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Fast booking, smooth process, and detailed results.
— Olivia Revan
Caught an issue early. I'm thankful I didn't wait.
— Denny Danaid
The results were so detailed and easy to understand.
— Sarah Mitchell
Great service! Found important health markers I didn't know about.
— Michael Chen
Quick turnaround and very professional. Highly recommend!
— Emma Johnson
Fast booking, smooth process, and detailed results.
— Olivia Revan
Caught an issue early. I'm thankful I didn't wait.
— Denny Danaid
The results were so detailed and easy to understand.
— Sarah Mitchell
Great service! Found important health markers I didn't know about.
— Michael Chen
Quick turnaround and very professional. Highly recommend!
— Emma Johnson