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Icon For Thyroid Function Assess thyroid function and indicate abnormal thyroid activity

Thyroid Function Home Test Kit

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Chief Scientific Officer


"All testing is conducted by healthcare professionals in a medically-led laboratory. Accredited lab testing is the best way to be confident that your test results are accurate. Get tested now for complete reassurance."


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Assess thyroid function and indicate abnormal thyroid activity with our simple and accurate fingerprick blood thyroid function home test kit.

Get thyroid function home test results delivered online, typically within 24 hours. Get rapid reassurance from an accredited clinical laboratory.

We Offer Two Quality Assured Validated Laboratory Tests:


Free Thyroxine (FT4)
Thyroid Stimulating Hormone (TSH)

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Learn More About Our Thyroid Function Test

6.1% of people tested have Free Thyroxine levels which are too low.

And 2.0% have levels that are too high.

Are you in the 91.8% with normal results?

Get Yourself Tested!

Learn more

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How Our Home Test For Thyroid Function Works

blood tests are fingerprick blood Thyroid Function test as little as 24 hours

£49

How Can I Test My Thyroid Function At Home?

You can test your Thyroid Function by carrying out the simple fingerprick blood sampling method.

Your blood sample can then be returned to the laboratory in a prepaid envelope for analysis.

Find out more about the Vitall range of at-home health tests and get accurate results delivered online.

How You'll Receive Your Test Results

Your Thyroid Function blood test results will be delivered quickly and securely to you in your personal online dashboard.
  • Each result is charted and clearly highlighted against normal ranges.
  • Any abnormal findings and possible reasons for this are fully detailed.
  • Receive an easy to understand overview of your health, fast.
  • Track your results over time to monitor lifestyle changes, treatments and behaviours.
  • Save up to 25% on repeat testing by subscribing when you checkout.

£49

Expert Blood Test Analysis in an Accredited Laboratory

Expert Thyroid Function Blood Test Analysis

Evidence-based health checks are analysed in an accredited laboratory.
Rapid home blood tests from a professional laboratory

Get Rapid Blood Test Results

Thyroid function test results returned in as little as 24 hours.
Improved health and wellbeing home blood testing

Find Peace of Mind

Assess thyroid function and indicate abnormal thyroid activity.

What's Tested In This Thyroid Function Home Test?

Two biomarkers are measured to assess thyroid function and indicate abnormal thyroid activity.

Using a Fingerprick Blood Sample, this Thyroid Function Test Assesses:

Thyroxine (T4) is the most prevalent thyroid hormone produced by the thyroid gland.

It is responsible for many vital roles in the body including, metabolism, heart and muscle function, brain development and bone maintenance.

Measurement of Free Thyroxine (FT4) is used to assess thyroid health.

Thyroid stimulating hormone (TSH) is a crucial hormone made in the pituitary gland.

When levels of thyroid hormone in your blood are low, more TSH is made and released from the pituitary gland. Conversely, when thyroid hormone levels are high, the pituitary gland produces lower levels of TSH.

This role in thyroid gland regulation makes a thyroid stimulating hormone (TSH) test ideal for assessing overall thyroid function.

£49

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Why Take The Thyroid Function Test?

Our Thyroid Function home blood test kit checks the two key Thyroid Function hormones to confirm normal thyroid function and indicate an overactive or underactive thyroid.

Thyroid disorders affect one in twenty people in the UK. Are you one of them?

Take control of your health without any of the inconvenience of going to the doctors with one of Vitall’s at-home blood tests.

Who Should Take The Thyroid Function Blood Test?

Assess thyroid function and indicate abnormal thyroid activity using a home fingerprick blood test kit.

You get the convenience of home testing with the reassurance of professional clinical analysis. Your results are delivered quickly & securely online.

This Thyroid Function Test is advised if you:

  • have a low sex drive & loss of libido;
  • are experiencing hair loss;
  • are overly sensitive to heat;
  • experience irregular periods;
  • experience poor memory;
  • experience tingling or pain in your hands;
  • experience unusual tremors;
  • find it difficult to sleep properly;
  • have a slower than normal pulse (heart rate);
  • have had weight gain;
  • have had weight loss;
  • have higher than normal heart rate;
  • have previously had borderline thyroid tests ;
  • often feel anxious for no reason;
  • struggle to gain weight;
  • suffer from chronic fatigue & tiredness;
  • suffer from constipation;
  • suffer from depression;
  • suffer from muscle cramps;
  • sweat excessively or have a fever;
  • want the convenience of home testing without waiting for a GP appointment;
  • need a high quality, clinically accredited test done in a professional clinical laboratory.

Take a complete health check-up with Vitall.

£49

How Much Do Thyroid Function Tests Cost?

The Vitall thyroid function test is available online for just £49. Your home test kit will be dispatched by free first class post for delivery to your door.

For the best value testing you can also upgrade this thyroid function home test to tests which also measure other biomarkers, including:

When you checkout to buy your thyroid function test online we also offer additional options, including:

  • Upgrade to next day delivery of your home test kit for an additional £7.99.
  • Visit the Patient Reception in central London for just £25. Your thyroid function test sample can be collected by a qualified nurse for immediate analysis.
  • Have a nurse visit you to collect the sample for your thyroid function test, this is available within the M25 area for just £149.

Whichever option you choose at checkout, buying the best thyroid function test online in the UK with Vitall ensures high quality results from an accredited laboratory.

Take control of your health today with one of Vitall’s home blood tests.

£49

Where Is Your Thyroid Gland?

The thyroid gland is a small butterfly-shaped organ that is located just below the Adam’s apple at the front of your neck.

What Does The Thyroid Gland Do?

The thyroid gland mainly produces two hormones: triiodothyronine (T3) and thyroxine (T4). Most T4 is converted to T3, which is the active hormone. T3 and T4 play an important role in regulating your heartbeat, brain health, skin dryness, breathing, weight, metabolism, growth, sexual functions, mood, and many other body functions. 

The production of these two hormones by the thyroid gland is controlled by the thyroid-stimulating hormone (TSH) which is released from the pituitary gland, a pea-shaped organ situated just below your brain. TSH production in turn depends on the amount of T3 and T4 in the bloodstream. This system creates the balance that your body needs to function optimally.
 

Why Take A Thyroid Function Home Test?

Taking a home thyroid function test is very important because the health of your thyroid will affect almost every aspect of your bodily functions and organs, from your heart to your weight, brain function, muscle development, and lungs to only name a few. 

An early understanding of thyroid problems is always beneficial because it can help contain the extent of the problem, which is why you should get tested regularly, especially if you take certain medications or have specific medical conditions that might affect the activity of your thyroid gland. 
 

The thyroid function and autoimmunity home test kit is also available to measure the levels of specific antibodies that are directed at the thyroid gland or hormones in auto-immune diseases.

£49

What Does A Home Thyroid Function Blood Test Show?

A thyroid function blood test measures the amount of free thyroid hormones (not linked to proteins) and TSH in your bloodstream. 

The results of your thyroid function test can tell you if your thyroid function is normal or if you have results consistent with primary hypothyroidism, subclinical hypothyroidism, hyperthyroidism, or subclinical hyperthyroidism. 

Having a high level of TSH means that your thyroid is underactive (hypothyroidism). If you have normal values of thyroid hormones with high levels of TSH, you may have subclinical hypothyroidism, which means you are at an early stage of the progression of the disease, and this is why you probably are not showing any signs or symptoms. If on the other hand, the thyroid hormone values are lower, it could be that you have primary hypothyroidism, which is at a more advanced stage compared to subclinical hypothyroidism.

Low levels of TSH indicate that your thyroid is overactive (hyperthyroidism). As with the underactive thyroid, having low levels of TSH with normal thyroid hormone levels means that you can have subclinical hyperthyroidism, whereas if you had higher levels of thyroid hormones, it probably means you have hyperthyroidism. 

The Vitall thyroid function with automimmunity blood test can also measure the levels of specific antibodies that are directed at the thyroid gland or hormones. The results of these tests are used to diagnose thyroid auto-immune diseases, a case in which your body's own immune system attacks your thyroid gland or hormones.
 

What Are Thyroid Function Test Normal Values? 

What are thyroid function test normal values? 

•    TSH: 0.27 to 4.2 mU/L (milliunits per litre)
•    FT4 (free T4): 12.0 to 22.0 pmol/L (picomoles per litre)
•    FT3 (free T3): 3.1 to 6.8 pmol/l (picomoles per litre)

Note that normal ranges will vary between laboratories, and may be amended over time.

Keep in mind that certain medications, pregnancy, and age are all factors that can influence your test results.
 

£49

What Are The Signs And Symptoms Of An Underactive Thyroid? 

The signs and symptoms of an underactive thyroid (hypothyroidism) usually develop over a long period of time and depend on the amount of thyroid hormones produced. Symptoms can also vary from person to person depending on their overall health. 

The most common symptoms include fatigue; weight gain; low tolerance to cold; dry skin; depression; constipation; slow heart rate; puffy face; muscle weakness and cramps; high cholesterol levels; impaired memory; stiffness and swelling of joints; irregular menstrual periods; thinning hair; swollen neck; frequent respiratory and urinary infections; insomnia; anaemia; and loss of sexual drive. 

If left untreated, an underactive thyroid can cause more severe symptoms such as hearing loss; hoarseness; and an even slower heart rate which can increase the risk of heart disease.

In infants, common signs and symptoms of an underactive thyroid include yellowness of the skin and the whites of the eyes; a larger than average tongue; difficulty breathing; an umbilical hernia; and excessive crying. 
 

What Are The Signs And Symptoms Of An Overactive Thyroid?

What are the signs and symptoms of an overactive thyroid?


As with an underactive thyroid, an overactive thyroid (hyperthyroidism) can cause different symptoms based on the person and the level of activity of the gland. 

The most common symptoms are weight loss; increased appetite; rapid and irregular heartbeat; anxiety; irritability; trembling of hands and fingers; diarrhoea; nausea; vomiting; excessive sweating; low tolerance to heat; thinning of the skin; swollen neck; development of breasts in men; itching; hair loss; insomnia; and urinating more frequently.

If left untreated, an overactive thyroid can cause serious health problems such as thinning of bones, vision loss, a higher risk of heart disease, and fertility problems.
 

£49

When Is The Best Time To Take A Home Thyroid Test?


If you recognize any of the symptoms mentioned above, you should talk to your GP who may then ask you to take the thyroid test. You can also take a thyroid test at home to check whether your thyroid hormone levels are in the normal range.

If you are diagnosed with an underactive thyroid (hypothyroidism), you should take the thyroid test once a year. If you are diagnosed with an overactive thyroid (hyperthyroidism), you should get tested every month at the beginning of the treatment and then less frequently as the medications begin to work. If your doctor changes your thyroid treatment, you should take the thyroid test after 2 months to measure the effects of the regimen change.

If you have no symptoms of hypothyroidism and your TSH is borderline high in 2 consecutive tests, your thyroid peroxidase antibodies test results will determine how often you need to do the regular check-ups.

The moment you take a thyroid test is very important because it all depends on whether you are undergoing other treatments on the side.

Anyone who is prescribed amiodarone must take the thyroid test before starting their treatment. You should take follow-up tests every 6 months in the beginning and then every 12 months.

If you take biotin supplements, you might need to wait 8 hours after the last dose to take the thyroid test.

Lithium can also affect thyroid function, so if you take this drug, you should get tested at least every 6 months.

Studies have shown that TSH levels peak during menstrual periods, so this is another factor to consider when getting your thyroid function tested.  

There are no real restrictions in terms of eating before taking the thyroid test, in fact, it is highly recommended to eat before the test as fasting can influence your TSH levels.
 

How Can I Keep My Thyroid Function Healthy? 

Following a healthy and balanced diet is essential in keeping your thyroid function healthy. You should also make sure that you eat enough antioxidant-rich food like nuts and berries and try to avoid gluten and starvation diets.

If you are pregnant or/and have type 1 diabetes, you should pay extra attention to your diet and get tested for thyroid functions regularly. In fact, these conditions can increase the risk of thyroid disease.

Sleep patterns also play an important role in maintaining your thyroid healthy. One study showed that if you sleep too little (less than 7 hours per day) or too much (more than 8 hours per day), you might be at a higher risk of developing thyroid problems. Having healthy sleep patterns also help you maintain a healthy immune system, which in turn helps you keep your thyroid healthy.
 

£49

Which Nutrients Are Important For Optimal Thyroid Health?

Which nutrients are important for optimal thyroid health?

If you have an underactive thyroid (hypothyroidism), adapting your diet can be very beneficial. With an underactive thyroid, your body needs more thyroid hormones (T3 and T4) to function properly. 

There are three elements that can help your thyroid to produce more hormones: iodine, selenium, and zinc.

Iodine is the building block of thyroid hormones T3 and T4, so reasonably increasing its intake can help your body. Seafood, such as fish, seaweed, and shrimp, is a good source of iodine. Dairy products (milk, yogurt, and cheese) and eggs are also good sources of iodine. Most table salt in the UK is iodized, which also makes it a practical source of iodine. Be careful not to consume too much iodine-rich food however, because it can lead to an overactive thyroid. 

Selenium plays a very important role in maintaining healthy thyroid hormone levels. It helps convert T4 into T3, the active form of the thyroid hormone. Important sources of selenium are nuts, cereals, grains, breads, eggs, seafood, chicken, and beef. 

Zinc not only helps the conversion of T4 into T3, but it also helps you maintain healthy levels of TSH. Shellfish, beef, chicken, beans, and nuts are good natural sources of zinc. Iodine and selenium supplements are also available on the market, but it is better to consult your physician before taking any.

On the other hand, if you have an overactive thyroid, you should eat food that is low in iodine such as non-iodized salt, honey, fruits, homemade breads, oats, potatoes, and unsalted nuts. Cruciferous vegetables like broccoli, brussels sprouts, cauliflower, kale, and bamboo shoots reduce the amount of iodine your thyroid uses, which can decrease the amount of thyroid hormones that are produced. 

Iron is another mineral that plays an important role in maintaining your thyroid healthy, in fact, studies have shown that people with an overactive thyroid had low levels of iron. Good sources of iron are red meat, poultry, seeds, whole grains, and green vegetables. It may seem counterintuitive, but food rich in selenium and zinc can also help you if you have an overactive thyroid. They ultimately help your thyroid gland regulate its activity.

Further Reading On Thyroid Function Tests At Home

1. Thyroid Function Tests [Internet]. Lab Tests Online UK - Association for Clinical Biochemistry and Laboratory Medicine. 2019 [cited 29 June 2021]. Available from: https://labtestsonline.org.uk/tests/thyroid-function-tests#:~:text=Currently%2C%20the%20majority%20of%20UK,the%20bridge%20of%20your%20nose.

2. Thyroid function tests - a complete guide [Internet]. British Thyroid Foundation. 2021 [cited 29 June 2021]. Available from: https://www.btf-thyroid.org/thyroid-function-tests

3. Underactive thyroid (hypothyroidism) [Internet]. National Health Service - UK. 2020 [cited 29 June 2021]. Available from: https://www.nhs.uk/conditions/underactive-thyroid-hypothyroidism/diagnosis/

4. Hyperthyroidism [Internet]. Thyroid UK. 2021 [cited 29 June 2021]. Available from: https://thyroiduk.org/if-you-are-hyperthyroid/

5. Current BTA guidelines and statements [Internet]. British Thyroid Association. 2021 [cited 29 June 2021]. Available from: https://www.british-thyroid-association.org/current-bta-guidelines-and-statements

6. Thyroid disease: assessment and management [Internet]. National Institute for Health and Care Excellence. 2019 [cited 29 June 2021]. Available from: https://www.nice.org.uk/guidance/ng145/chapter/Context

7. Favresse J, Burlacu M, Maiter D, Gruson D. Interferences With Thyroid Function Immunoassays: Clinical Implications and Detection Algorithm. Endocrine Reviews. 2018;39(5):830-850.

8. Sheehan M. Biochemical Testing of the Thyroid: TSH is the Best and, Oftentimes, Only Test Needed – A Review for Primary Care. Clinical Medicine & Research. 2016;14(2):83-92.

9. Esfandiari N, Papaleontiou M. Biochemical Testing in Thyroid Disorders. Endocrinology and Metabolism Clinics of North America. 2017;46(3):631-648.

10. Danzi S, Klein I. Amiodarone-Induced Thyroid Dysfunction. Journal of Intensive Care Medicine. 2013;30(4):179-185

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Order Your Thyroid Function Test Kit Now

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Your Options Available at Checkout Are:


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Take a Thyroid Function Home Test as Part of a Health Check:

Hormonal Balance

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You Can Upgrade this Thyroid Function Home Test to:

Thyroid Function & Autoimmune Reaction

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Assess thyroid function and indicate abnormal thyroid immune activity

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Expert Blood Test Analysis in an Accredited Laboratory

Expert Thyroid Function Blood Test Analysis

Evidence-based health checks are analysed in an accredited laboratory.
Rapid home blood tests from a professional laboratory

Get Rapid Blood Test Results

Thyroid function test results returned in as little as 24 hours.
Improved health and wellbeing home blood testing

Find Peace of Mind

Assess thyroid function and indicate abnormal thyroid activity.

£ 49