[1]
High trust
MedlinePlus: Thyroid tests
Patient-facing overview of thyroid blood tests, including TSH, T4, T3, and thyroid antibody tests.
What blood test is for thyroid?
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3 high-trust sources across 3 hosts.
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The most common first thyroid blood test is TSH, and clinicians may also order free T4, T3, thyroid antibodies, or a thyroid panel depending on symptoms and the question being checked. AI can explain what these test names mean, but thyroid results should be reviewed with a clinician because ranges, pregnancy, medicines, supplements, symptoms, and repeat testing can change the interpretation.
Indexed sources
[2]
High trust
Cleveland Clinic: Thyroid tests
Plain-language explanation of thyroid test types and why healthcare providers use them.
[3]
High trust
Mayo Clinic: Hypothyroidism diagnosis and treatment
Clinical-patient education page describing TSH and T4 testing in thyroid evaluation.
Not medical advice.
Use this page for source review, not diagnosis, treatment, medication changes, or emergency triage.