Thyroid function tests are currently the most accurate way to diagnose and manage thyroid disorders. Your doctor will interpret the blood test results, together with your symptoms and how you feel, to reach a diagnosis to manage your treatment.
|TSH||0.4||4.5||mU/L (milliunits per litre)|
|FT4||9.0||25.0||pmol/L (picomoles per litre)|
|FT3||3.5||7.8||pmol/L (picomoles per litre)|
These ranges are only a guide. The reference range for FT4 in particular does currently vary between methods and so any 'typical' reference range quoted will be subject to method and local interpretation
A high TSH level with a low FT4 level: Hypothyroidism (under-active thyroid)
A low TSH level with a high FT4 level and a high FT3 level: Hyperthyroidism (over-active thyroid)
Abnormal TSH levels together with normal FT4 levels indicate you may be at risk of developing a thyroid disorder
A low TSH levels together with a low FT4 levels can indicate a disorder of the pituitary gland
If you have a diagnosed thyroid disorder, thyroid function tests will
It is well recognised that thyroid problems often run in families and if family members are unwell they should be encouraged to discuss with their own GP whether thyroid testing is warranted
|Download Quick Guide pdf|
Leaving a Legacy
Help to make a real difference by remembering BTF in your Will.
July 2014 BSL Signed Information Clips
SignHealth have created a series of signed informational videos about thyroid issues. Find them on their website here
26 June 2014
Diagnosis of babies with Congenital Hypothyroidism
Please complete this survey to let us know about your experiences.
8 June 2014
Iodine supplements for a healthy thyroid
Information about the importance of taking iodine supplements and who needs them.
Drug Availability Updates
The latest news and updates from pharmaceutical companies can be found below.
We have surveys for which participants are required.
Support the BTF by getting a BTF key ring
Soy? Coconut Oil? Kelp? Don’t know what to believe? False claims, quick fixes and promises exposed here.
British Thyroid Association British Thyroid Association - medical professionals encouraging the highest standards in patient care and research.
British Association of Endocrine and Thyroid Surgeons - the representative body of British Surgeons who have a specialist interest in surgery of the endocrine glands (thyroid, parathyroid and adrenal)