WHAT IS A FREE T4 LAB TEST?
Free T4 measures the free, unbound thyroxine levels in your bloodstream. Free T4 is typically elevated in hyperthyroidism, and lowered in hypothyroidism. Free or unbound T4 levels represent the level of hormone available for uptake and use by cells. Because the free levels of T4 represent immediately available hormone, free T4 is thought to better reflect the patient’s hormonal status than total T4.
AM I REQUIRED TO FAST FOR THIS LAB TEST?
WHAT IS THE PRICE OF A FREE T4 LAB TEST?
*Price may vary by location – contact your local ANY LAB TEST NOW
WHAT ARE THE TEST RESULT RANGES?
|<1 Year||Not established|
|1-9 Years||0.9-1.6 ng/dL|
|10-18 Years||0.9-1.4 ng/dL|
|>18 Years||0.8-1.8 ng/dL|
WHAT TYPE OF PHYSICIAN SHOULD I SEE IF MY TEST RESULTS ARE OUT-OF-RANGE?
You should see your primary care physician. If needed, you may be referred to an endocrinologist.