What should I do if free thyroxine (FT4) is low?
In general, low free thyroxine (FT4) levels may be caused by insufficient iodine intake, aging, Hashimoto's thyroiditis, subacute thyroiditis, or post-thyroidectomy status. It is recommended to seek medical attention promptly, identify the underlying cause, and then improve the condition through general management, medication, or other treatments under a doctor's guidance. Daily life should include maintaining emotional stability, avoiding excessive anxiety, and following a balanced diet.
Sep 18, 2025

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