Order your kit
Your test arrives in discreet packaging with clear instructions.
About this test
Measures TSH, free T4 and free T3 in one blood panel. It provides a broader thyroid-hormone snapshot, but abnormal values require clinical interpretation and do not identify the cause by themselves.
At a glance
- Sample: Blood
- Collection: Self-collected sample using the supplied kit
- Estimated turnaround: 1 day from laboratory receipt of a usable sample
What this test measures
- Thyroid-stimulating hormone (TSH)
- A pituitary signal used to assess thyroid function. A high or low result can suggest an underactive or overactive thyroid pattern, but free thyroid hormones, symptoms, medicines and pregnancy status may be needed for diagnosis.
- Free T4
- The unbound fraction of a main thyroid hormone. A low or high result is interpreted with TSH to assess thyroid function; illness, pregnancy and medicines can alter the pattern.
- Free T3
- The unbound fraction of the more active thyroid hormone. A high result may support an overactive-thyroid pattern; a low result is less specific and can occur during non-thyroid illness.
How clinicians use this test
Clinicians use Thyroid-stimulating hormone (TSH), Free T4 and Free T3 to assess the thyroid hormone pattern and help investigate possible underactive or overactive thyroid function. Diagnosis depends on the combination of results, symptoms, medicines and biological context.
Is this the right test for you?
An adult exploring the stated hormone marker with a clinician or monitoring an established plan, with collection timing and medicines taken into account.
Preparation and collection
Return the sample on the same day it is collected. Do not post over weekends or bank holidays.
Understanding your result
The most useful information is usually the pattern across Thyroid-stimulating hormone (TSH), Free T4 and Free T3, not one isolated flag. Related markers can support or contradict each other, and a mildly out-of-range value may reflect normal biological variation, collection conditions or temporary illness rather than disease.
Your results and next steps
Review the result with collection timing, medicines and related hormones in mind. Do not start, stop or change prescribed hormone or thyroid treatment from a single home-test result without clinician advice.
Limitations
Hormone values can vary with collection time, age, medicines and biological state. A single result does not establish the cause of symptoms.
When to get medical help
Do not wait for a home-test result if you feel seriously unwell. Call 999 for a life-threatening emergency, or use NHS 111 when you need urgent advice and are unsure what to do.
How it works
Collect your sample
Follow the kit guidance for the sample type shown above.
Post the same day
Post Monday–Thursday using the supplied tracked return.
Get your results
View secure, doctor-reviewed results and clear guidance online.
Questions, answered
How accurate is an at-home test?
Your sample is processed by a professional UK partner laboratory using the same analytical methods used for clinician-requested testing. Sample quality depends on following the collection instructions carefully.
Are my results private?
Yes. Kits use discreet packaging and your results are delivered through a secure digital service.
Does this diagnose a condition?
No. The test checks and measures biomarkers. Results and the doctor’s comment can help you decide what to discuss with your GP.
When should I post my sample?
Collect and post on the same day, ideally Monday–Thursday, to avoid a sample waiting in the postal system over a weekend.
What happens if my sample cannot be processed?
The support team will explain the next step if the laboratory cannot process your sample. Any recollection or refund depends on the circumstances and the applicable policy.
When should I speak to my GP?
Speak to your GP if symptoms persist, worsen or concern you. Seek urgent medical help for severe or sudden symptoms.
Independent customer reviews
4.3
2,423 customer reviews on Trustpilot
Read reviews on TrustpilotThyroid Profile (FT3/FT4/TSH) Test£34.99