
Blood Spot Thyroids
ZRT Laboratory
Sample type: Bloodspot
Requires fasting: No
At home test
Details
This panel provides a full assessment of thyroid health for screening for thyroid disorders or for medication monitoring.
- Total Thyroxine, Blood Spot
- Thyroid Peroxidase Antibodies, Blood Spot
- Thyroid-Stimulating Hormone, Dried Blood Spot
- Thyroglobulin, Blood Spot
- Free Thyroxine, Blood Spot
- Free Triiodothyronine, Blood Spot
Estimated days for results: Results should arrive 8-10 business days after the lab receives samples.
8–10 business days
Before You Start
3 Days Before Collection
Day of Collection
- Read the provided test collection instructions carefully.
- Watch the test collection video.
- You can collect your sample at any time.
3 Days Before Collection
- DO NOT take biotin/vitamin B7.
Day of Collection
- Collect your sample within one hour of waking.
State restrictions:
Patient can't order this test if they are located in Hawaii, Puerto Rico, New Jersey, New York, or Rhode Island




