Choose Labs test kit
Thyroid Function Test
Test 4 key markers linked to overall thyroid health & function..
- What each marker measures, listed below
- A finger-prick blood sample you take at home
- Results in about 3–4 days once the lab receives your sample
- Ships free
What This Test Measures
Thyroid-Stimulating Hormone (TSH)
The pituitary hormone that tells the thyroid how much T3 and T4 to make.
Free Triiodothyronine (FT3)
The unbound form of T3, the thyroid hormone your cells use most directly.
Free Thyroxine (FT4)
The unbound form of thyroxine (T4), the main hormone the thyroid releases.
Thyroid Peroxidase Antibodies (TPO-Ab)
Antibodies to thyroid peroxidase, an enzyme the thyroid uses to make its hormones.
The list of markers is from Choose Health's own Thyroid Function Test page. The short descriptions are ours.
How It Works
- 1
Collect your sample
At home, with the painless lancet in the kit. Four or five drops of blood are enough for every marker on this test.
- 2
Send it to the lab
Post it back in the prepaid envelope that comes in the kit, from any USPS post office or drop box.
- 3
Get your results
Results are shared securely online about 3–4 days after the lab receives your sample.
Choose Health states that all testing is performed by CAP- and CLIA-accredited laboratories.