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Free Thyroxine (Free T4)
Unbound fraction of thyroxine in blood; interpreted with TSH and clinical context to assess thyroid function, including situations where TSH alone may be insufficient.
What is measured?
The level, concentration or activity of this biomarker measured in the relevant blood sample.
What the result represents?
Aden's range
What a raised or a low result can indicate
How Aden reads it as part of a system?
Aden reads this result alongside TSH, free T3, TPOAb, TgAb, TRAb and your previous measurements. It is treated as one part of the wider thyroid picture, not as a diagnosis on its own.
What changes between tests?
Which related markers give it context?
TSH, free T3, TPOAb, TgAb, TRAb
How to get this tested?
Evidence
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