Low TSH Explained: Free T4, Thyroid Panel, and Causes
Thyroid Health Lab Interpretation 2026 Update Patient-Friendly A low TSH usually means the pituitary is sensing enough—or too much—thyroid hormone. If free T4 or free T3 is high, think hyperthyroidism; if they are normal, the result is often subclinical hyperthyroidism, medication effect, pregnancy-related suppression, illness, or a transient lab shift. A low TSH paired with […]