Blood Tests » Thyroid

Thyroid

Your thyroid controls the pace of nearly every process in your body — from how quickly you burn calories to how clearly you think. When thyroid hormones drift out of balance, the effects show up as unexplained fatigue, stubborn weight changes, mood swings, or feeling too hot or cold. Because these symptoms overlap with so many conditions, blood testing is the only reliable way to know if your thyroid is the cause.

Thyroid-Stimulating Hormone (TSH)

Evaluates thyroid function affecting metabolism, energy, weight, mood, and body temperature regulation. Helps detect hypothyroidism and hyperthyroidism before symptoms become severe — essential for women, those with family history, and during pregnancy.

Learn more about Thyroid-Stimulating Hormone (TSH)

Triiodothyronine (T3) Free

Measures the most active thyroid hormone that directly affects cellular metabolism and energy. Helps detect T4-to-T3 conversion problems missed by standard thyroid tests — essential for those with persistent symptoms despite normal TSH and T4.

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Thyroxine (T4) Free

Measures active thyroid hormone production to track thyroid function over time and catch subtle changes early. Helps establish your personal baseline, detect declining function before symptoms develop, and optimize thyroid medication dosing.

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Thyroid Peroxidase Antibodies (TPO)

Detects autoimmune thyroid disease years before thyroid dysfunction develops. Helps predict future hypothyroidism risk, guide treatment decisions for subclinical disease, and identify pregnancy-related thyroid risks

Learn more about Thyroid Peroxidase Antibodies (TPO)

Thyroglobulin Antibodies

Detects autoimmune thyroid activity that TPO antibodies alone may miss, completing your thyroid autoimmune profile. Essential for thyroid cancer surveillance where TgAb affects tumor marker reliability.

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Iodine

Your thyroid can’t make hormones without iodine. Testing reveals whether you’re getting enough of this essential trace element — critical for metabolism, development, and especially important during pregnancy.

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Selenium
Addon

Evaluates selenium status essential for thyroid hormone conversion, antioxidant protection, and immune function. Helps optimize thyroid health and may reduce autoimmune thyroid activity in deficient individuals

Learn more about Selenium

* This blood test can be added for an extra charge and is not included in the $499 membership.

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