Thyroid Function Test

Learn whether a thyroid disorder is causing problems with your weight, energy levels, mood, sleep and more.

Drop-in and pre-booked appointments available. Results in 2 - 3 business days.

Excellent 4.9 out of 5 Trustpilot

Book your appointment now - £59Find your nearest location
Perfil ETS

What’s included in the analysis?

The thyroid is a gland located in the neck that produces hormones that regulates the body's metabolism, how we use and store energy. This test is used to diagnose and control hypothyroidism and hyperthyroidism, which can be the cause of weight gain, tiredness and fatigue, feeling cold and mental health problems.

Free Thyroxine (FT4): T4 is the most abundant thyroid hormone in the blood. However, only about 1% of T4 in the blood is freely available for use by cells, the rest is bound to a protein. A FT4 test measures the amount of T4 that is biologically active in the blood and can exert an effect on bodily functions.

Triiodothyronine (FT3): T3 is thought to be responsible for most, if not all of the effects of thyroid hormones. About 20% of T3 in the blood is secreted by the thyroid gland, with the remainder being produced by the conversion of T4 in cells around the body. Like T4, most of the T3 molecules in the blood are bound to a protein and only a very small fraction is freely available and biologically active.

Thyroid-Stimulating Hormone (TSH) is produced by the pituitary gland and is responsible for regulation of the secretion of T3 and T4 from the thyroid gland.

Thryoid Function Test

3 markers

What's included in the analysis?

What's included in the price?

A trained professional will take a blood sample from your arm at one of our network of clinics. We’ll send this to our lab where we’ll analyse it for specific thyroid biomarkers.

Your lab results will be reviewed by one of Melio's doctors who will provide you with a personalised report and tips to improve your health.

What is being measured?

This test measures your levels of the three thyroid hormones Triiodothyronine (T3), Thyroxine (T4) and Thyroid Stimulating Hormone (TSH).

Who should get tested?

It’s estimated around 1 in 20 people in the UK have some kind of thyroid disorder.

There are many different symptoms, meaning it can be hard to tell if you’re suffering from a thyroid problem. Common symptoms of thyroid issues include tiredness and fatigue, weight gain, sensitivity to cold and mental health issues.

When should I get tested?

It’s up to you to decide where you want to be tested for thyroid problems. But if you’re struggling with any of the common symptoms and you want to get tested, there’s no time like the present.

Getting tested means you’ll be able to better manage any thyroid problems you have.

Find a clinic near you

How Superdrug works

Find your nearest location

Find your nearest location and drop-in or book an appointment.

Attend your consultation

Visit the clinic and take your professional blood test.

Receive your results

Our doctors send results to your online account.

What our customers think



Blood test

Mary took my blood today and was brilliant. I didn't feel well and she made sure I was OK before leaving. The procedure was painless and they squeezed me in last minute which was really helpful.

I had a blood test with Julie Nash

I had a blood test with Julie Nash, she was wonderful, really put me at ease and made the whole process fast, efficient and painless would recommend.

Professional and friendly

Sheena was professional, friendly and efficient. She put us at ease and talked us thoroughly through our recommended vaccination package. The side effects were very clearly discussed with us...

Mary at Craigleith was so lovely and…

Mary at Craigleith was so lovely and talked us through the everything really well. Test went well! Thank you!

Take control of your health

If you’re struggling with your weight, energy levels, mood or sleep and think your thyroid could be the culprit, this is the place to start.

Take our blood test and find out how you can manage your health better.

  • Analysed by an accredited laboratory
  • Personalised doctor's report on the Melio platform
  • Includes up to 5 key thyroid markers
Book your appointment now- £59
Take control of your health

Around 5% of people have some kind of thyroid disorder, but many affected are unaware

“The blood tests gave me the answers I needed to get my life back on track”

Quote author


Frequently asked questions

About the Thyroid Function Screen

Thyroid disorders are common and can easily go undetected. Symptoms of a problem with the thyroid function include weight gain, tiredness, low mood and depression, and are often overlooked by patients suffering from disorders.

The Thyroid Screen measures the levels of three hormones Triiodothyronine (T3), Thyroxine (T4) and Thyroid Stimulating Hormone (TSH), this will support a diagnosis and control of hypothyroidism and hyperthyroidism.

Hypothyroidism, underactive thyroid is the most common thyroid disorder and can be managed with life style and medication.

What can I expect to happen?

When you attend your appointment the nurse will ask you some basic medical questions to ensure you are well enough for the blood test. Your screen will consist of a blood sample, usually from your arm.

When you attend your appointment the nurse will ask you some basic medical questions to ensure you are well enough for the blood test. Your screen will consist of a blood sample, usually from your arm.

Do I need to prepare?

There is no need to fast (go without food or drinks) for this test.We do suggest keeping your arm warm, as being cold can sometimes make it harder to draw your blood, and stay well hydrated.

If blood tests make you anxious, let your nurse know at the start of your appointment. They will do their best to make the experience as stress-free as possible.

What I will be tested for

  • Thyroid-Stimulating Hormone

  • Free thyroxine (FT4)

  • Free tri-iodothyonine (FT3)

For a more detailed thyroid analysis have a look at our Thyroid Plus Screen which also tests for Anti-TPO Antibody Status and Levels, used to detect autoimmune thyroid diseases such as Hashimoto’s thyroiditis and Grave’s disease.

How do I get my results?

Your results will usually be ready in 2-3 days. Melio Health are our labs and diagnostics partner, in your appointment the nurse will register you with them in order for  your sample to be tracked, and for the doctors to be able to analyse your results.

Your results will be available from this portal, and you will receive an SMS notifying you when they are available.

We recommend that that the thyroid function is monitored if there are ongoing symptoms, and you can use this portal to track your levels over time.

You will need to consent to the nurse setting up a Melio Health account for you and your personal data being entered on the Melio patient portal; their terms and conditions can be found Melio Health Terms of Use.