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Essential Thyroid Profile

Overall comprehensive assessment of thyroid function. Four (4) tests:free T4, free T3, Thyroid Stimulating Hormone (TSH), Thyroid Peroxidase Antibody (TPO).


  • Purchase on our secure website.
  • Lab order is provided by us.
  • You receive a collection kit for saliva, urine, or finger stick to collect at home and mail to the lab. Some tests require a blood draw at a local lab.
  • You receive the results by email within 2-3 weeks.
  • Practitioner phone consultations available.
SKU: zrtthy Product Categories: ,



  • No phlebotomist or centrifuging required
  • Collection times can be optimized – very important for determining early morning baseline hormone levels, testing of hormones multiple times during the day, and assessment of HRT dosing
  • Nearly painless finger prick, simple and safe (stress of conventional blood draw can alter test results)
  • Private (home collection) and convenient for both patient and doctor
  • Hormones are stable in dried bloodspot at room temperature for weeks allowing for worldwide shipment
  • Less expensive than conventional blood draws (no phlebotomist, centrifuge, or expensive shipment)
  • Ease of collection allows for routine monitoring and adjustment of hormone supplementation as needed.


ZRT Labs

ZRT Laboratory is committed to delivering convenient, minimally-invasive saliva and blood spot testing services. ZRT Laboratory’s comprehensive test report provides information to help monitor hormone usage and restore hormonal balance. ZRT Laboratory is an independently owned and operated CLIA (Clinical Laboratory Improvement Amendments) certified hormone testing facility.
Notice something different? In order to serve you better, we have launched a new site and design. Due to this change, previous customers will be required to create a new account
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