• T4, Free (Direct)
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LabCorp

T4, Free (Direct)

T4, Free (Direct)

$14.99
$14.99
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Not available to be serviced at Labcorp locations in NY.

The T4, Free (Direct) test measures the level of free thyroxine (T4) in the blood, which is the active form of the thyroid hormone. This test helps assess thyroid function by evaluating how much T4 is available to the body's tissues. 

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