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T4 (Thyroxine)

200

Thyroxine, also known as T4, is a type of thyroid hormone. This test measures the level of T4 in your blood. Too much or too little T4 can indicate thyroid disease.

Test information: Fasting not necessary, but preferred

Reporting: Within 6 hours*

  • Fasting is not necessary but preferred.
* For details, please see service-related policies

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