Common Sense Labs – Thyroid Bundle


Thyroxine (T4) Free, Direct


Triiodothyronine, Free, Serum


Reverse T3, Serum




Thyroid Antibodies

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Special instruction: This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to stop biotin consumption at least 72 hours prior to the collection of a sample.

Turnaround time: Expected turnaround is within 4-6 business days, although this may vary depending on other tests ordered for the same blood draw, and expected variation with LabCorp testing.