Test Information
This page provides the approved information currently maintained for this laboratory test. It is not a substitute for medical advice or result interpretation.
Category: Thyroid Function Test
Purpose of the Test
Measures thyroxine (T4), the main hormone produced by the thyroid, to support evaluation of whether the thyroid may be overactive or underactive, usually together with TSH.
Preparation
Please contact Globalife for the preparation requirements of this exact test before collection.