Thyroid Test


Do you suffer from symptoms such as low energy, unexplained weight gain or loss, changes in mood, dry skin, or muscle aches?

You may be suffering from an imbalance of your thyroid hormones.

Find out how well your thyroid gland is functioning with our simple, at-home thyroid check.

Tests for Free Thyroxine (FT4)
Tests for hyroid-Stimulating Hormone (TSH)
Simple at-home finger-prick blood test
No in-person interaction required
Hospital-standard, easy-to-read traffic light results
Clear guidance as to what to do next
Expert advice to better support your overall health
You must be aged 18 years or over to take this test
Not available to pregnant or breastfeeding customers
Only available in the UK

Optimise your health at home with our Thyroid Test

Take control of your wellness and start making positive lifestyle changes. Understand whether your thyroid hormone levels may be impacting your health and what you need to do next.

Take this quick and easy home-to-laboratory finger-prick blood test for quick results and helpful advice. You will receive your test results within 7 days, and you will be given advice on whether your results are at an acceptable level, or if a visit to your GP is recommended.

Being aware of your thyroid function – and whether you might have an underactive thyroid or an overactive thyroid – is the first step to making positive changes that can improve your overall health. It also makes it easy to track your thyroid hormone levels over time.

Take these simple steps to change your life for the better.

HOW THE Thyroid Test WORKS

4 Simple Steps To A Healthier You


Receive Your Thyroid Test

Order your Thyroid Test online and we will post your kit directly to your home


Take The Easy Finger-Prick Blood Test

Collect 2–3 drops of blood from your Thyroid Test and post your sample to our laboratory


Receive Your Results Within 7 Days

Review your easy to read, traffic, light results: high, borderline, and normal reactivity


Ongoing Support

Ongoing support and guidance from our Customer Care Team regarding your Thyroid Test

What's In The Thyroid Test?

Your kit includes a free return envelope, making it easy for you to post your sample back to us securely. You can leave the rest to us – our team of diagnostic experts will analyse your sample with our partner laboratory and send you easy-to-read, accurate results and advice.

Thyroid Test
A prepaid return envelope (UK only)
Two single-use lancets
One blood collection tube
One plastic blood collection tube caseª
Two adhesive plasters
A cleansing wipe

Measuring Your Thyroid Function Is Important, Particularly If You…

want optimised health to take on whatever comes your way
suffer from fatigue or tiredness
are sensitive to cold or heat
have unexplained weight loss/gain
have trouble sleeping
get muscle aches and cramps
have dry skin


Thyroxine (T4) is a hormone made by the thyroid gland. We measure levels of Free T4, which is a key marker for thyroid function.

We also measure Thyroid-stimulating hormone (TSH) which is the pituitary (brain) hormone that controls the thyroid gland.

Thyroid Test FAQs

The thyroid gland is a butterfly shaped endocrine gland that’s located in the front part of the neck just below the Adam’s apple. The thyroid gland plays a vital role in the metabolism, development, and regulation of the human body. It uses iodine from the food we eat (an element that the body can’t make on its own) to produce the key thyroid hormones, tri-iodothyronine (also known as T3) and tetra-iodothyronine (also called thyroxine or T4). The thyroid gland also makes the peptide hormone calcitonin. The former two are what are referred to as “thyroid hormones” made by this gland and they play a crucial role influencing aspects such as the body’s weight, internal temperature, energy levels, skin, hair and nail growth among others.

Depending on the state in which the body is in, the requirement for more or less of the thyroid hormones is finely balanced. To ensure the right amount of hormonal balance, the thyroid gland relies on the pituitary gland to signal via a hormone called Thyroid stimulating Hormone (TSH) whether to release more or fewer hormones into the bloodstream. For instance, increased production of T3 and T4 may be needed to boost the body’s metabolic rate if it slows.

Thyroid blood tests usually measure TSH, T4 and sometimes T3, to assess thyroid function. T4 is usually measured as free T4 (the portion of active T4 circulating in the blood) and T3 is usually measured as free T3. The YorkTest Thyroid Test measures TSH and free T4 (FT4).
Advanced thyroid function tests also measure thyroid antibodies.

Early signs of thyroid problems include:

– Gastrointestinal problems (Diarrhoea (hyperthyroidism); Constipation (hypothyroidism))

– Mood changes (Anger, anxiety (hyperthyroidism); Depression (hypothyroidism))

– Weight changes (Weight loss (hyperthyroidism); Weight gain (hypothyroidism))

– Skin problems (Oily skin (hyperthyroidism); Dry skin (hypothyroidism))

– Sensitivity to temperature changes (Difficulty in hot weather, sweating when it’s not excessively hot, hot flashes (hyperthyroidism); Difficulty in cold weather, needing to wear extra layers inside, cold feet and hands (hypothyroidism))

– Vision changes (Watery eyes; Eye redness or dryness; Difficulty closing the eyelids; Bulging eyes)

– Hair thinning or hair loss

– Memory problems

– Lumps or nodules on the neck See a doctor if you notice a lump on the neck

Both hypothyroidism and hyperthyroidism are prevalent forms of thyroid disease that impact millions of individuals throughout the world.
Hypothyroidism refers to an underactive thyroid gland (that does not produce enough thyroid hormone), this can be caused by autoimmune thyroid disease, thyroid cancer treatment, certain medicines, a malfunctioning pituitary gland, or the excessive intake of certain foods.

Hyperthyroidism is a condition where the thyroid gland produces more thyroid hormones than is needed by the body, an overactive thyroid gland. This can be caused by a condition called Grave’s disease (an autoimmune disorder), an enlarged thyroid gland (goitre), or thyroiditis (temporary inflammation of the thyroid gland).

No, you do not need to fast before taking a thyroid blood test unless you are also taking the YorkTest Cholesterol Test or the YorkTest Essential Health Check at the same time.


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