Essential Thyroid Profile - Blood Spot


Test Details

Test Company: ZRT
Test Type:
Blood Spot
Collection Location:
 At Home

This profile looks at the following markers: 

  • Free T3 (fT3)
  • Free T4 (fT4)
  • TPO Antibodies (TPOab)
  • TSH (Thyroid Stimulating Hormone)

Key Things to Know:

  • This is a blood spot test that can be done entirely at home
  • You can collect this test at any time of the month
  • Avoid anti-aging/anti-wrinkle facial creams for 3 days prior to testing as they may contain undisclosed hormones. 
  • If you are a hormone user, make sure to follow specific instructions in the attached PDF


Collection Instructions & Videos


Photo courtesy of ZRT.


  • Your provider will notify you when results are in and schedule a follow-up to review them together


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