TP - Root Cause Thyroid Panel #2

The TP - Root Cause Thyroid Panel #2 panel contains 4 tests with 6 biomarkers.

TP - Root Cause Thyroid Panel #2 contains the following tests.

  • T3, Free #34429 (1 Biomarkers)
  • Thyroid Peroxidase and Thyroglobulin Antibodies #7260 (2 Biomarkers)
  • T4, Free #866 (1 Biomarkers)
  • TSH #899 (1 Biomarkers)

"IMPORTANT - Please note that Quest only returns values up to 900 for the Thyroid Peroxidase Antibodies test.

The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.

Also known as: Free T3, FT3, T3 Free

T3, Free

This test measures the amount of triiodothyronine, or T3, in the blood.

Also known as: Free T4, FT4, T4 Free

T4, Free

The free T4 test is not affected by protein levels. Since free T4 is the active form of thyroxine, the free T4 test is may be a more accurate reflection of thyroid hormone function.

Thyroglobulin Antibodies

Measurement of thyroglobulin antibodies is useful in the diagnosis and management of a variety of thyroid disorders including Hashimoto's thyroiditis, Graves Disease and certain types of goiter.

Thyroid Peroxidase

Also known as: Thyroid Stimulating Hormone, Thyroid Stimulating Hormone (TSH), Thyrotropin


A TSH test is a lab test that measures the amount of thyroid stimulating hormone (TSH) in your blood. TSH is produced by the pituitary gland. It tells the thyroid gland to make and release thyroid hormones into the blood.


*Process times are an estimate and are not guaranteed. The lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

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