You are here:
Lab Tests/Thyroid
Advertisement
Question
What is the normal range of T4, free in a thyroid test?
Nonda,
It can range from 0.8-1.5 ng/dl. In other labs, I've seen it range from 0.7-2.1 ng/dl. So it really depends on the lab. I'd suggest asking the lab where you are getting the test for their reference range, if they don't supply it with your test results.
- Beth
Related Articles
- Free T3: Understanding Thyroid Lab Tests
- Tell if You Are Hypothyroid
- Tell if You Are Hyperthyroid
- The Thyroid TSH Reference Range Battle: Are Your Doctors, Labs and Practitioners Using the Old Outdated or New Recommended Normal TSH Thyroid Range
- The TSH Reference Range Wars: What's "Normal?", Who is Wrong, Who is Right...And What Does It All Mean For You and Your Health?
Lab Tests
Answers by Expert:
Beth , MT (ASCP) (5)
Expertise
I can answer questions about the purpose of a certain lab test and what an abnormal result could indicate. I cannot make a diagnosis.
Experience
I recently earned my BS degree in clinical laboratory science. I did rotations in medical laboratories as a student.
Publications
allexperts.com
Education/Credentials
I have a BS in clinical laboratory science, with a minor in chemistry. I am certified with the American Society of Clinical Pathologists.
©2012 About.com, a part of The New York Times Company. All rights reserved.