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BiomarkersLabs.com publishes clinical updates, biomarker spotlights, practitioner resources, case studies, and regulatory compliance guidance for licensed healthcare professionals. Editorial content sourced from peer-reviewed literature and consensus guidelines.

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May 10, 2026

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Spotlights8 min read

TSH: The First-Line Marker for Thyroid Function — A Practitioner Reference

Thyroid stimulating hormone (TSH) is the most sensitive single marker of thyroid function in primary care and a foundational test across endocrinology, women's health, and functional medicine. This spotlight covers the physiology, reference range debates, interpretation pitfalls, and where TSH fits alongside Free T4, Free T3, and thyroid antibodies.

BiomarkersLabs Editorial Team

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