Thyroid Health
A thyroid blood test is referenced alongside other hormone tests to inform your health across key systems in the body. Your thyroid is a small but powerful gland that controls how your body converts food into energy, influencing everything from metabolism and mood to weight, and temperature regulation. An underactive thyroid can slow metabolism, cause fatigue, weight gain, and depression. An overactive one can drive anxiety, heart palpitations, and rapid weight loss.
Biomarkers we test to track thyroid health
Thyroid biomarker testing measures TSH, T4, T3, free T3, free thyroxine index, reverse T3, and TPO antibodies in the blood. These lab tests show how well your thyroid is producing and converting thyroid hormone and whether immune activity, conversion issues, or pituitary signaling may be affecting thyroid function.
Thyroid Peroxidase Antibodies (TPO)
TPO antibodies are produced when the immune system mistakenly attacks the thyroid, making them the key marker for autoimmune thyroid conditions like Hashimoto's disease.
Learn More About Thyroid Peroxidase Antibodies (TPO)Free T3 (FT3)
FT3 is the freely available form of T3 (triiodothyronine) in the bloodstream. It reveals how much active thyroid hormone your body has access to.
Learn More About Free T3 (FT3)Triiodothyronine Uptake
T3 is the active form of thyroid hormone that determines how efficiently your cells use energy, offering a more complete picture of thyroid activity than TSH alone.
Learn More About Triiodothyronine Uptake (T3 uptake)Thyroxine (T4)
T4 is the thyroid's primary hormone and a key indicator of how well the gland is functioning, with levels that help distinguish between thyroid and pituitary causes of imbalance.
Learn More About Thyroxine (T4)Thyroid-Stimulating Hormone (TSH)
TSH is the pituitary hormone that tells the thyroid how much hormone to produce, making it the most important first indicator of thyroid dysfunction, including hypothyroidism and hyperthyroidism
Learn More About Thyroid-Stimulating Hormone (TSH)Free Thyroxine Index (FTI)
The Free Thyroxine Index provides a calculated estimate of active T4 in the blood, helping to contextualize total T4 levels and assess true thyroid hormone availability.
Learn More About Free Thyroxine Index (FTI)Hone’s Testing Process
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Book your lab test
Schedule an advanced 40+ biomarker lab test
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Meet with a Licensed Physician
A private 1:1 telehealth appointment to discuss your lab results, symptoms, health history, and health goals. *Not applicable to the basic plan.
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Receive a Personalized Treatment Plan
Get prescriptions shipped to your door and ongoing lab tests, with results shared on an easy-to-read dashboard.
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Continuous Monitoring for Better Outcomes
Measure your progress with regular consultations and adjustments to your care plan.
