Check how your thyroid is working, Cardiff
One blood test for the five markers that show how your thyroid is functioning. It checks TSH, free T4 and free T3 plus two thyroid antibodies, so symptoms like weight changes, fatigue or feeling the cold have something clear to point to. Self-refer at our Penarth or Cowbridge clinics near Cardiff.
5 thyroid markers.
What is included for £95
- ✓Blood draw at Penarth or Cowbridge, near Cardiff
- ✓TSH, free T4 and free T3
- ✓Two thyroid antibodies (Anti-TG and Anti-TPO)
- ✓Plain-English report with your results and reference ranges
- ✓Anything outside the normal range flagged clearly
- ✓Report emailed to you, easy to share with a clinician
Put a name to how you have been feeling
The thyroid drives your metabolism, so when it is over or underactive it can affect your weight, energy, mood, temperature and sleep. This test measures the five markers that show how it is working, including the antibodies behind common autoimmune thyroid conditions, giving you and your doctor a clear starting point.
A fuller thyroid picture
Not just TSH, but free T4 and free T3 plus two antibodies, so an underactive, overactive or autoimmune pattern is easier to spot.
A report you can read
Your results come with reference ranges and plain-English notes, with anything out of range flagged so it is easy to spot.
A doctor if you want one
Prefer to talk it through? Book a private GP appointment and one of our doctors will go through your results and next steps.
Worth checking if you recognise these
This test is a sensible step if you have symptoms that a thyroid problem can cause.
These symptoms can have many causes and should be reviewed by a doctor. This test helps find a cause; it does not replace medical assessment.
The five markers in the panel
Every marker in the thyroid profile, measured together from one sample. Tap to see the full list.
Thyroid health 5
Your report lists every marker measured with its reference range.
Difficult veins? We find them with ultrasound
If you have fragile or hard-to-find veins and have had failed attempts before, our consultant radiologists can take the sample under real-time ultrasound. It is the only such service in South Wales, and patients travel to us from across Wales and the West for it.
Nobody had managed to take my blood in years without several attempts. Here it was done first time with the ultrasound. Such a relief.
Verified Google reviewFrom booking to answers, step by step
Book
Self-refer online or by phone. No GP letter needed. Same-week appointments at Penarth or Cowbridge.
Your appointment
The draw takes about 15 minutes. Tell us if you have difficult veins and we will use ultrasound.
Your report
A plain-English report with reference ranges, emailed to you, with anything out of range flagged.
Talk it through
Optional: book a private GP appointment to go through your results and plan any next steps.
Thyroid Health blood test
All inclusive. Five thyroid markers in one test.
- ✓Blood draw at Penarth or Cowbridge
- ✓TSH, free T4, free T3 and two thyroid antibodies
- ✓Plain-English report with reference ranges, emailed to you
- ✓Ultrasound-guided draw available for difficult veins
A £50 booking deposit secures your slot and comes off the total.
Common questions about the thyroid blood test
How much is the Thyroid Health blood test?
£95 all inclusive. That covers the blood draw, all five markers, and a plain-English report emailed to you. A £50 deposit secures your appointment and comes off the total.
Which markers does it test?
Thyroid stimulating hormone (TSH), free thyroxine (free T4), free tri-iodothyronine (free T3), and two thyroid antibodies: anti-thyroglobulin (Anti-TG) and anti-thyroid peroxidase (Anti-TPO).
Why include thyroid antibodies?
The antibodies help identify autoimmune thyroid conditions such as Hashimoto's or Graves' disease, which are common causes of an underactive or overactive thyroid. Testing them alongside TSH, T4 and T3 gives a fuller picture than hormone levels alone.
Do I need a GP referral?
No. This is a self-refer test. Book online or call 029 2199 9300.
Do I need to fast or prepare?
No fasting is needed for a thyroid test. If you take biotin supplements, it is worth pausing them for a couple of days beforehand as they can affect some thyroid results. If you take thyroid medication, mention it when you book. We will confirm anything specific to you.
How quickly will I get my results?
This panel usually has a fast turnaround. Your report lists every marker with its reference range and flags anything out of range. Ask us when you book and we will give you a clearer idea.
Where is the blood taken?
At our Penarth clinic (13 Washington Buildings, CF64 2AD) or our Cowbridge clinic (10 High Street, CF71 7AG). Both are a short drive from Cardiff with easy parking.
I have difficult veins. Can you still take blood?
Yes. Our consultant radiologists can take the sample under real-time ultrasound, the only such service in South Wales. Mention it when you book so we can allow time.
Can a doctor talk me through my results?
Yes. You can book a private GP appointment and one of our doctors will go through your results and next steps.
Want a doctor to explain the results?
Thyroid results are best understood alongside your symptoms and history. Book a private GP appointment and one of our doctors will talk you through what your results mean and any next steps.
Book a GP appointmentTwo clinics, close to Cardiff
Penarth Clinic
13 Washington Buildings
Stanwell Road, Penarth
CF64 2AD
Mon to Thu 9:00 to 18:00
Fri 9:00 to 17:00
Sat 9:00 to 15:00
Cowbridge Clinic
Beauty Within
10 High Street, Cowbridge
CF71 7AG
By appointment. Please call for availability.
Get directionsPatients travel to us from Cardiff, Penarth, Cowbridge, Barry, Newport, Bridgend and across the Vale of Glamorgan.
Important: Thyroid results are most useful when reviewed by a doctor who knows your history, symptoms and any medication you take. This test is a starting point, not a diagnosis. We recommend discussing your results with your own GP, or booking a private GP appointment with us, before acting on any findings or changing medication. Lab values alone do not constitute medical advice.
See how your thyroid is working.
Self-refer for the Thyroid Health blood test: TSH, free T4, free T3 and two thyroid antibodies, checked in one appointment. £95 all inclusive at Penarth or Cowbridge, near Cardiff.