Thyroid-stimulating hormone (TSH) blood test in Glasgow

Get an Thyroid-stimulating hormone (TSH) blood test delivered straight to your door in Glasgow. Track what’s going on inside your body and improve your health.

Did you know?

Joseph Lister pioneered the use of antiseptics in surgery while working at Glasgow Royal Infirmary. His progressive views were mocked at the time but eventually it earned him the title of the “father of modern surgery”.

What is thyroid-stimulating hormone?

Thyroid-stimulating hormone (TSH) is a hormone produced by your pituitary gland. TSH stimulates your thyroid to produce the thyroid hormones triiodothyronine (T3) and thyroxine (T4).

What is its function?

TSH helps regulate the production of T3 and T4 (thyroid hormones). These hormones play a key role in regulating your metabolism — for example, they help regulate your heart rate, body temperature, and breathing.

If your T3 and T4 levels are low, more TSH is produced. This stimulates your thyroid to produce more T3 and T4. If your T3 and T4 levels are high, less TSH is produced.

What can cause it to change?

Low TSH If your thyroid is overactive (hyperthyroidism) it can cause low TSH levels — due to high T3 and T4 levels.

If you're taking any medication containing T3, it might affect your results. To avoid this, it's best to take your blood sample first thing in the morning after fasting.

High TSH If your thyroid is underactive (hypothyroidism) it can cause high TSH levels — due to low T3 and T4 levels.

If you're over or under-treating an existing thyroid condition with medication, your TSH levels could be out of range. Other causes might include:

  • chronic illness
  • an acute severe illness
  • stress
  • pregnancy
  • some medications
  • a problem with your pituitary gland

What are the most common symptoms?

Low TSH If your thyroid is overactive (causing low TSH), common symptoms include:

  • weight loss
  • increased appetite
  • excessive sweating
  • sensitivity to heat
  • twitching
  • fatigue
  • irritability and anxiety
  • heart palpitations
  • difficulty sleeping

High TSH If your thyroid is underactive (causing high TSH), common symptoms include:

  • tiredness
  • weight gain
  • depression
  • constipation
  • dry skin
  • brittle hair
  • sensitivity to cold
  • memory problems
  • muscle aches
  • hoarse voice

In women, high or low thyroid hormones might affect your period — for example, it might cause heavy or irregular periods.

What can I do to change my levels?

There are a number of nutrients that are important for your thyroid function:

  • Iodine — helps make thyroid hormones
  • Zinc — helps make thyroid hormones
  • Selenium — helps make thyroid hormones
  • Iron — plays an important role in thyroid hormone metabolism
  • Vitamin D — plays an important role in your immune function and low levels are linked to autoimmune thyroid disorders

If your levels indicate you have a thyroid disorder, it’s important to work with your doctor to come up with a treatment plan.

What is Thriva?

We’re a subscription-based health tracking company. With our blood testing kits you can take control of your health and see exactly what’s happening inside your body. Learn what lifestyle really works for you and improve everything from your sleep and energy levels to your heart health.

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Get your Thriva kit

Order your test online. We’ll post your kit the next working day via Royal Mail first class delivery.

Test kit contents

Perform your test

Your kit contains everything you need for your simple finger-prick blood test. When you’re done, use the freepost envelope to send it back.

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Results within 48 hours

Your full results, along with a personalised report from a qualified GP, will be available to access online.

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