Skip to content
Hello Gloucestershire! Bristol and Cheltenham clinics now open.
Hello Gloucestershire! Bristol and Cheltenham clinics now open.
 hello@onedaytests.com  0127 309 2844 (08:00 - 12:00)
Health Dashboard Customer Stories Wellness Library Partner Services Affiliates

NOTES FROM THE LAB

Hello! My name is Jamila Quaye and I am a senior biomedical scientist with a specialism in haematology, here at One Day Tests laboratory.

Thyroxine (T4) - description and reference ranges

What is it?

Thyroxine (T4) is one of the two hormones produced by the thyroid gland that help to regulate metabolism. The other hormone is Triiodothyronine (T3).

They should be looked at together, but T4 in the blood can either be "unbound (free)"" or "bound" to proteins.

Unbound T4 is what regulates metabolism, giving a good overall marker for thyroid activity. Too much or too little T4 can be a sign of thyroid disease.

T3, T4 and TSH results are frequently used together for the diagnostics of thyroid problems.

Reference ranges

Thyroid Function Blood Test

 


THYROID FUNCTION BLOOD TEST

£39.00 - £39.00
£39.00
£39.00 - £39.00
£39.00
View full details

A perfect test for symptoms such as weight gain, fatigue, or hair loss, as well as a family history of thyroid disorders.

Quick test finder

Quick test finder

Find what you need in under 30 seconds with our (very clever!) test finder. We offer a huge range of markers all a few clicks away, as well as fastest turnaround times.

Find your test

You might also like to read

See more