Thyroid Function Test




4 - 12 hrs


15 mins

lady checking thyroids

Thyroid hormone level screen

Hormones produced by the thyroid help regulate metabolism and overall energy, and an imbalance can play havoc with your wellbeing. Thyroid disorders are 15 times more common in women than in men.


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Thyroid cancer cases are preventable in the UK
New cases of thyroid cancer in the UK (2018)
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Thyroid cancer cases are caused by obesity
Completed Blood Test This Year

What is the Thyroid Function Test

The thyroid function test checks the levels of thyroid (thyroxine and triiodothyronine) and thyroid-stimulating hormones (TSH) in your blood. The results could indicate conditions such as hypothyroid (underactive) or hyperthyroid (overactive) thyroid, depending on your levels.

There are several broad symptoms related to thyroid dysfunction. If you notice any of these, you should get tested for thyroid disorders.

Signs of an overactive thyroid

Hyperthyroidism, or an overactive thyroid, occurs when the thyroid gland produces excessive thyroid hormones, primarily thyroxine (T4) and triiodothyronine (T3). Here are some common signs of hyperthyroidism:

  • Sudden weight loss
  • Fatigue
  • Mood swings, anxiety
  • Diarrhoea
  • Palpitations
  • Menstruation and fertility changes
  • Heat sensitivity
  • A swollen neck (enlarged thyroid gland)

Signs of an underactive thyroid

Hypothyroidism, or an underactive thyroid, occurs when the thyroid gland doesn’t produce enough thyroid hormones, primarily thyroxine (T4) and triiodothyronine (T3). This can lead to a range of signs and symptoms, such as:

  • Weight gain
  • Low energy
  • Being sensitive to the cold
  • Feeling depressed
  • Dry and scaly skin
  • Aches and pains of muscles
  • Menstruation and fertility changes

How To Book A Blood Test

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Use our online booking engine or book your test by giving us a call.

Choose your test type

On the online booking engine select the “appointment type” you need.

meet with our experts

You will be seen by one of our friendly phlebotomists or trained clinicians.


Type of sample taken: Blood

Please ensure that you are well-hydrated before you come in for your blood test.

During the test

The thyroid test is a simple blood test. A needle is inserted into a vein, usually on the inner arm near the elbow, and a small amount of blood is drawn. You may feel a pricking or scratching sensation.

Your results will be sent to you by email. If you had a consultation with one of our doctors, the doctor will give you a call first to discuss the results with you.

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Thyroid Function Test

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What is the thyroid?
The thyroid, also referred to as a thyroid gland, is found in the neck, behind a cartilage known as the ‘Adam’s apple’. The thyroid is responsible for producing hormones which control metabolism and affect bodily growth rates and other functions. Your thyroid therefore plays an important role when it comes to your health. An imbalance of thyroid hormones can strongly affect your wellbeing.
Nodules, or small lumps, on the thyroid, or an enlargement of the gland, can be an indicator either of oestrogen dominance, when your natural hormone levels are out of balance, or of toxicity (either through diet, environmental factors, or chemicals in skincare products). If you have or think you have thyroid nodules, it is advised that you see a doctor to get checked out.
Thyroid checks are recommended if you have a family history of thyroid disorder. Women can start experiencing thyroid-related symptoms as early as their late teens and 20s, particularly if another family member has a thyroid condition. In general, it is recommended you begin getting regular check-ups around age 30, or at any point when you have concerns.

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