Lab test vial

Free T4 (Thyroxine)

$9.00 USD
Sale price  $9.00 USD Regular price 
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Lab test vial

Free T4 (Thyroxine)

$9.00 USD
Sale price  $9.00 USD Regular price 

Free thyroxine is the unbound, active thyroid hormone. Paired with TSH to evaluate thyroid function.

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