Our most thorough blood spot assessment of thyroid function. Includes: Total Thyroxine (T4), free Thyroxine (fT4), free Triiodothyronine (fT3), Thyroid Stimulating Hormone (TSH), Thyroid Peroxidase Antibody (TPO) and Thyroglobulin (Tgbn). (Blood Spot Test – Adds an indicator to the Essential Thyroid Profile of low iodine status and total T4 production by the thyroid gland.

Not Suitable for people who are uncomfortable about collecting their own sample (samples may be collected in provider’s office).


Additional Information

Dried Blood Spot Testing
 Dried blood spot is a form of collection where patients place blood drops on a filter card after a finger prick with a lancet. This process offers distinct advantages over serum because it eliminates the need for a blood draw – saving you time and money. It’s also a convenient way to assess blood levels of sex steroid hormones.

Once dry, blood spot cards are extremely stable for shipment and storage, and the dried blood format offers excellent correlation with serum tests.

Why measure in blood spot?
 Blood spot testing is the ideal method for measuring cardiometabolic markers, thyroid hormones, vitamin D and other analytes such as insulin, blood lipids, Vitamin D, and elements like lead and magnesium.

ZRT developed the science for accurately measuring hormones in dried blood spot and is currently the only lab to offer this method commercially. While serum testing is widely accepted, the lesser known blood spot test method offers results that have been proven equivalent to serum.