Thyroid
Free T4 (FT4)FT4pmol/L
The active thyroid hormone in your blood.
TypeMeasured valueMaterialSerumResult12-24 hours
Reference ranges
What is a normal value?
Reference range by sex. Where your result falls depends on several factors — this is not a personal result.
Please note — these reference ranges are indicative and not yet reviewed by a registered (BIG) doctor. They may vary between laboratories and individuals.
Everyone12 – 22pmol/L
0reference range25 pmol/L
About the sample
Collected at home, measured in the lab
Material
Serum
Blood volume
50 µL
Result
12-24 hours
Turnaround times are an estimate from when your sample arrives at the lab and may vary.
Finger-prick collection kit by postResult in ~48 hoursReviewed by a registered (BIG) doctorFree return
Tests with this value
This biomarker is part of the following blood tests.
Measure this value at home
Order a collection kit, take a few drops of blood at home and receive your result with a review by a registered doctor.
View the tests →