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Tag: Hyperthyroidism blood tests

September 19, 2026

Graves’ Disease Blood Tests: Why TSH, Free T4, T3, and TRAb/TSI Must Be Read Together

How TSH, Free T4, T3, and receptor antibodies help distinguish Graves’ disease from other causes of thyroid-hormone excess.

Graves’ disease blood tests answer two connected questions: are thyroid hormones excessive, and is autoimmune stimulation the cause? TSH, Free T4, and T3 describe thyroid function. TRAb or TSI helps identify antibodies associated with Graves’ […]

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