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Tag: subclinical hypothyroidism

September 19, 2026

High and Low TSH Levels: How to Interpret TSH Test Results

Why TSH should be interpreted with Free T4, selective T3 testing, thyroid antibodies, symptoms, medications, pregnancy status, and trends.

High and low TSH levels are signals to interpret with Free T4 and the clinical setting. High TSH commonly accompanies insufficient thyroid hormone production; low TSH commonly accompanies thyroid-hormone excess. Pregnancy, pituitary disease, medicines, acute […]

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August 4, 2026

Hashimoto’s Thyroiditis: Reading TSH, Free T4, TPO, and Thyroglobulin Antibodies as One Pattern

Thyroid antibodies help explain the autoimmune cause; TSH and Free T4 show what the thyroid is doing now.

Hashimoto’s thyroiditis testing should answer two different questions. First, is an autoimmune process affecting the thyroid? Thyroid Peroxidase Antibodies (TPO) Test and Thyroglobulin Antibodies (TgAb) Test help address that question. Second, is the thyroid currently […]

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