Thyroid Test

Our thyroid test is a home blood test finger prick kit offering an in depth insight into your thyroid health. An affordable alternative to private thyroid tests, provides an assessment of T3, T4 and TSH levels.

It is thought that 1 in 20 people in the UK will experience a thyroid disorder in their lifetime, yet many people with such disorders don’t even know they have them.

The typical symptoms of an underactive thyroid (hypothyroidism) or an overactive thyroid (hyperthyroidism) can include weight gain or loss, tiredness, muscle weakness and low moods.

However, these symptoms could be caused by any number of other things too. So the best way to identify any potential problem is with a thyroid function blood test. Ours is an efficient and cost effective alternative to in-clinic private thyroid blood tests.

Our home thyroid blood test kit includes the three main markers recommended by the British Thyroid Foundation to identify problems:

  • Thyroxine (T4)
  • Thiiodothyronine (T3)
  • Thyroid Stimulating hormone

Thyroid function blood tests might not be accurate during illness, so avoid taking this test at these times.

Test cost:
Finger prick
Estimated turnaround
2 days
From receipt of sample

Why take a thryoid test?

  • You’re concerned you may have an underactive or overactive thyroid
  • You have recently experienced weight gain or weight loss and would like to identify a potential reason for it
  • You’ve been experiencing muscle weakness, fatigue and a lack of energy
  • To track your thyroid function over time in order to monitor the progress of an existing condition

Benefits of thyroid testing

Many of us will experience a thyroid disorder in our lives and a T3, T4 and thyroxine test is a fast and accurate way to identify whether you have a thyroid imbalance.

By identifying any problems with your thyroid, you can take the necessary measures to rectify the problem and alleviate the symptoms that typically come with it.

Our thyroid imbalance tests take the form of a simple finger prick blood test you take at home. Simply post the sample back to our lab and within days you will have access to your T3, T4 and TSH level results in a clear dashboard.

Included in this test


Tested biomarkers
  • Triiodothyronine (T3, free)
  • Thyroxine (T4, free direct)
  • Thyroid Stimulating Hormone (TSH)

How it works

Collect sample

We will send you a finger prick kit to use at home

Post sample

Pop your sample in the post to us using a pre-paid envelope

Online results

View your results on your secure personal health dashboard

What our customers say

Forth really helped me understand issues that I was having, which in the end turned out to be problems with iron absorption. Without their test I would never have known this. I now have the knowledge I need to improve.

Sean Conway

As a working mum, I often find myself training ‘tired’ as the demands of day-to-day life take their toll.  Forth has enabled me to gain a valuable insight into what is happening ‘under the surface’, so I  can adapt my training and lifestyle.

Kate Allan

I'd put off getting regular blood tests before because of the long-winded process of a GP visit. Forth has changed all that. The process is very quick and very easy, with thorough, well-explained results delivered to your inbox within days.

Alice Hector

I enlisted the help of Forth to help me get to the bottom of my current health concerns. The test was really easy to and my results were available within day. Using Forth has helped me take the action needed to get my hormones back on track.

Holly Rush, 39

As a former Olympic cyclist I always wanted to look after my health. This has never changed to this day but become a lot easier via Forth, it’s the only way to really understand your own body. 

Brian Smith

I suffer from a hereditary condition which causes my body to store too much iron.  My biggest issue before using Forth was getting an appointment with my GP.  Now using Forth I can track my iron quickly and easily and take action before levels start to affect my health

Mark Threfall, 29

I ran my first marathon in 2014 which left me feeling exhausted and constantly unwell. What I didn’t know then was that my iron and vitamin D levels were incredibly low.  By using Forth to test key biomarkers has put me in control of the areas I need to improve.

Jude Peck, 42

I was keen to use Forth’s service to help monitor my haematological markers in particular since I've had problems in the past and by the time they are picked up by the GP I'm normally feeling unwell.  The test was quick and easy to do and results were back very quickly. The results are also incredibly accurate, being almost identical to those from tests done by my GP the same day.

Alice Lethbridge

Taking the test is simple just make sure you follow all the instructions so you follow the correct procedures. The customer service is second to none and the results are easy to understand and follow.

Matthew Bottrill

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