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Advanced Thyroid Blood Test

£65
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Results within 2 working days
Our at home thyroid blood test checks key thyroid hormones TSH, FT4 and FT3 together with thyroid antibodies to establish if your thyroid is functioning correctly.
What's included
your discount will be applied at checkout

Why Test Your Thyroid Function?

It’s estimated that 1 in 20 people in the UK are suffering from thyroid problems, but it could be much higher, as people live with symptoms without being diagnosed.

Our thyroid blood tests are quick and easy to use. The test comes with everything you need to collect a blood sample at home, and post it back to us using the pre-paid postage label.

The test will measure the TSH, FT3 and FT4 levels in your blood. These hormones regulate your body’s metabolism, so you’ll be able to identify an underactive or overactive thyroid.

Once we have your sample, you’ll have results within 2 working days, helping you to understand how your thyroid is functioning, and what you can do if your levels are high or low.

When to take This tesT

You can provide the sample for the thyroid check at any time but we don’t recommend checking your thyroid levels at times of illness as this may not give you an accurate result.

What Biomarkers Are Included In An
Advanced Thyroid Test?

The biomarkers included in a thyroid function test include TSH, T3, T4 and thyroid antibodies.

Thyroid stimulating hormone regulates the production of the thyroid hormones thyroxine (T4) and triiodothyronine (T3). TSH controls the release of these hormones in the blood and is an indicator of how well the thyroid gland is working. It is tested to check for an overactive or underactive thyroid.

Thyroxine (T4) is measured alongside TSH and T3 to help identify thyroid issues. High levels of T4 is due to an overactive thyroid, whereas low levels are due to an underactive thyroid.

T3 is the more active form of thyroxine and like T4 it is measured to identify whether the thyroid is working properly. It is used to diagnose an overactive thyroid.

Thyroglobulin is a large protein stored in the thyroid gland and aids the production of both T3 and T4. Raised levels of thyroglobulin antibodies are associated with autoimmune diseases that affect the thyroid.

Thyroid peroxidase antibodies (TPO) are a biomarker used to detect the presence of autoimmune thyroid disease. These antibodies develop when the immune system mistakes the components of the thyroid gland or its proteins as foreign. Therefore, if thyroid disease is present, TPO antibody levels will be high.

What Are the Symptoms of
An Overactive Thyroid?

Thyroid conditions
x6 more likely
women are six times more likely to have a overactive thyroid problem than men.
Thyroid conditions
1/20 people
have thyroid disorders in the UK.

The difference between an underactive and an overactive thyroid are the levels of hormones the gland produces. For that reason, the symptoms can differ according to how fast or slow your body’s cells are working.

If you have hyperthyroidism (an overactive thyroid), then your thyroid is producing too much thyroid hormone and causing your body’s cells to work at a faster rate.

The symptoms of an overactive thyroid, include:

  • Feeling nervous, anxious, or irritable
  • Mood changes
  • Difficulty sleeping
  • Fatigue
  • Muscle weakness
  • Itchiness
  • Hyperactivity
  • Sensitivity to heat

The condition can also cause physical symptoms which you or close friends and family may find more noticeable such as:

  • Goitre – a large swelling in your neck
  • Fast or irregular heartbeat
  • Thinning hair or hair loss
  • Loose nails
  • Twitching or trembling
  • Eye problems
  • Warm skin
  • Excessive sweating

What Are the Symptoms of
An Underactive Thyroid?

An underactive thyroid or hypothyroidism is the most common thyroid disorder. Because your cells are working too slow as a result of too few thyroid hormones being produced, it can cause:

  • Feeling tired
  • Weight gain
  • Constipation
  • Depression
  • Dry skin
  • Low sex drive
  • Sensitivity to cold
  • Slow movements and thoughts
  • Brittle hair and nails
  • Irregular or heavy periods

Thyroid Health in Women

Women are 6x more likely to have an overactive thyroid gland than men and it’s estimated that 1 in 50 women live with an overactive thyroid gland or hyperthyroidism.

Some of the symptoms associated with thyroid disorders are similar to menopause symptoms. So, it’s common for these symptoms to be diagnosed as menopause or linked to stress.

For example, an underactive thyroid shares many symptoms with the menopause and hypothyroidism is most common in menopausal aged women. It is important to distinguish between the menopause and a thyroid issue or if, indeed, you are experiencing both. It’s particularly important because both can increase the risk of long-term health complications such as heart disease and osteoporosis.

A thyroid check analyses the levels of thyroid hormones in your blood and these can be used to identify thyroid conditions.

WHAT IS A NORMAL THYROID LEVEL FOR WOMEN?

The normal level of TSH in women is 0.27-4.2 mIU/L (milli-international units per litre), FT4 is 12-22 pmol/L (picomoles per litre) and FT3 is 3.1-6.8pmol/L.

Dr Nicky Keay
the Experts Opinion

“Thyroid disorders are quite common, affecting around 5% of the UK population with women being more prone to thyroid disorders than men. If you are experiencing symptoms of fatigue, mood changes, poor sleep or unexplained weight gain or loss then you may have a thyroid issue. This advanced thyroid test can be easily done at home and will help identify a thyroid disorder. It checks your levels of TSH, T4, T3 as well as thyroid antibodies. High T3 and T4, combined with low levels of TSH are indicative of an overactive thyroid, whereas low levels of T3 and T4 with high levels of TSH are associated with an underactive thyroid. NICE set TSH levels above 10 mU/L as indicative of hypothyroidism.”

Dr Nicola Keay
BA, MA (CANTAB), MB, BCHIR, MRCP
Forth Chief Medical Officer

Improve Your
Advanced Thyroid Check

Want to improve your health & wellbeing? Forth gives you insight into your body’s key biomarkers. By tracking essential markers overtime you can build a picture of your own unique self and discover how your body responds to the changes you make so you can reach your personal best.

Frequently asked questions

 Here are some of the most frequently asked questions. If you need anything else try our help section.

  • What does the hormone TSH do?

    Thyroid-stimulating hormone (TSH) is produced by the pituitary gland and acts on the thyroid to stimulate it to produce the hormones thyroxine and triiodothyronine.

  • What is an overactive thyroid?

    An overactive thyroid, also known as hyperthyroidism,  means you have too much thyroid hormone acting on the cells in your body which speeds them up. Their increased function can cause a variety of symptoms, such as anxiety, fast heartbeat, weight loss, sleep disturbances, trembling, and excessive sweating.

  • What autoimmune conditions can cause thyroid disorders?

    Thyroid conditions can be caused by autoimmune diseases where your immune system mistakenly attacks its own cells resulting in an immune response and some unpleasant symptoms.

    Graves’ disease, for example, causes hyperthyroidism or an overactive thyroid. Because your immune cells attack the thyroid, it causes it to produce more thyroid hormones than your cells need and speeds up the rate at which they work. Whereas Hashimoto’s disease is an autoimmune condition that causes an underactive thyroid (hypothyroidism). It occurs when your immune system attacks the thyroid causing damage which results in not enough thyroid hormones being produced and slowing down your cells’ metabolism.

  • What is triiodothyronine?

    Triiodothyronine, also known as T3, is a hormone produced by your thyroid and affects nearly all of the processes in the body. It helps to regulate your metabolism, so how fast or
    slow your cells work.

  • What is an underactive thyroid?

    An underactive thyroid is also known as hypothyroidism and is caused by a lack of thyroid hormones. Because there aren’t enough thyroid hormones being made, the activity of your cells slows down and causes symptoms such as weight gain, low mood, and forgetfulness.

  • What are thyroid levels supposed to be?

    TSH – 0.27-4.2 mIU/L

    Thyroxine (FT4) – 12-22 pmol/L

    Triiodothyronine (FT3) – 3.1 – 6.8 pmol/L

    Please note reference ranges can vary by lab and analytical process.

Want To Personalise Your test?

Would you prefer to test more biomarkers in the same sample of blood? All our tests are customisable and can be tested in just one sample of blood. Click the button below to add more biomarkers to this test.

GET £10.00 OFF YOUR NEXT ORDER*
Dr Nicky Keay
the Experts Opinion

“Thyroid disorders are quite common, affecting around 5% of the UK population with women being more prone to thyroid disorders than men. If you are experiencing symptoms of fatigue, mood changes, poor sleep or unexplained weight gain or loss then you may have a thyroid issue. This advanced thyroid test can be easily done at home and will help identify a thyroid disorder. It checks your levels of TSH, T4, T3 as well as thyroid antibodies. High T3 and T4, combined with low levels of TSH are indicative of an overactive thyroid, whereas low levels of T3 and T4 with high levels of TSH are associated with an underactive thyroid. NICE set TSH levels above 10 mU/L as indicative of hypothyroidism.”

Dr Nicola Keay
BA, MA (CANTAB), MB, BCHIR, MRCP
Forth Chief Medical Officer

Improve Your
Advanced Thyroid Check

Want to improve your health & wellbeing? Forth gives you insight into your body’s key biomarkers. By tracking essential markers overtime you can build a picture of your own unique self and discover how your body responds to the changes you make so you can reach your personal best.

Frequently asked questions

 Here are some of the most frequently asked questions. If you need anything else try our help section.

  • What does the hormone TSH do?

    Thyroid-stimulating hormone (TSH) is produced by the pituitary gland and acts on the thyroid to stimulate it to produce the hormones thyroxine and triiodothyronine.

  • What is an overactive thyroid?

    An overactive thyroid, also known as hyperthyroidism,  means you have too much thyroid hormone acting on the cells in your body which speeds them up. Their increased function can cause a variety of symptoms, such as anxiety, fast heartbeat, weight loss, sleep disturbances, trembling, and excessive sweating.

  • What autoimmune conditions can cause thyroid disorders?

    Thyroid conditions can be caused by autoimmune diseases where your immune system mistakenly attacks its own cells resulting in an immune response and some unpleasant symptoms.

    Graves’ disease, for example, causes hyperthyroidism or an overactive thyroid. Because your immune cells attack the thyroid, it causes it to produce more thyroid hormones than your cells need and speeds up the rate at which they work. Whereas Hashimoto’s disease is an autoimmune condition that causes an underactive thyroid (hypothyroidism). It occurs when your immune system attacks the thyroid causing damage which results in not enough thyroid hormones being produced and slowing down your cells’ metabolism.

  • What is triiodothyronine?

    Triiodothyronine, also known as T3, is a hormone produced by your thyroid and affects nearly all of the processes in the body. It helps to regulate your metabolism, so how fast or
    slow your cells work.

  • What is an underactive thyroid?

    An underactive thyroid is also known as hypothyroidism and is caused by a lack of thyroid hormones. Because there aren’t enough thyroid hormones being made, the activity of your cells slows down and causes symptoms such as weight gain, low mood, and forgetfulness.

  • What are thyroid levels supposed to be?

    TSH – 0.27-4.2 mIU/L

    Thyroxine (FT4) – 12-22 pmol/L

    Triiodothyronine (FT3) – 3.1 – 6.8 pmol/L

    Please note reference ranges can vary by lab and analytical process.

Want To Personalise Your test?

Would you prefer to test more biomarkers in the same sample of blood? All our tests are customisable and can be tested in just one sample of blood. Click the button below to add more biomarkers to this test.

GET £10.00 OFF YOUR NEXT ORDER*
Get 10% off your first order, plus great health tips, advice and support from our expert team.
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