STTM TSH, Free T3, Free T4 Blood Test
What’s Being Tested:
- TSH
- Unbound (free) T3
- Unbound (free) T4
Fasting: No
Specimen Type: Blood (Draw Location | How It Works | FAQs)
Turnaround time: 5-7 Business Days
Important Notes:
- If you’re using a supplement that includes biotin, which is also known as vitamin B7, B8, vitamin H, or coenzyme R, and is commonly found in products that promote the health of nails, skin, and hair, it is advisable to refrain from sample collection for a minimum of 72 hours after your last dose.
- This test cannot be collected in NY, NJ, MA, and RI. Contact us with questions.
Medical Review Board
Reviewed by Jeff Donohue M.D. from Body Logic and Brady Hurst DC, CCCN. Written by True Health Lab’s team of editorial health contributors.
Disclaimer: This information is for educational purposes only and not intended as medical advice. Consult your healthcare provider for personalized guidance.
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