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Thyroid Stimulating Hormone Testing (TSH)

The Thyroid Stimulating Hormone test is also known as a Thyrotropin or thyrotropic hormone test.

All you need to know about testing Thyroid Stimulating Hormone levels with a laboratory test

  • What is the Thyroid Stimulating Hormone test for?
  • How to test Thyroid Stimulating Hormone?
  • What if Thyroid Stimulating Hormone results are high?
  • What if Thyroid Stimulating Hormone results are low?
  • Who should take the Thyroid Function Blood test?

Thyroid Stimulating Hormone Testing UK Statistics 2026

Icon For Thyroid Stimulating Hormone
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9.1% of people tested have Thyroid Stimulating Hormone levels which are too high.

And 5.5% have levels that are too low.

2.8

Low
< 0.27

Normal
0.27 - 4.20

High
4.20 +

The average Thyroid Stimulating Hormone result is 2.8 uIU/mL
Note what is normal for you may differ for your age and sex.

Are you in the 85.4% with normal results?
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What Is The Thyroid Stimulating Hormone Test For?

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.

TSH is also a very useful marker of appropriate dose of thyroid replacement medication if you have an underactive thyroid.

How To Test Thyroid Stimulating Hormone

By buying a laboratory test kit with professional nurse or clinic collection, you can accurately measure Thyroid Stimulating Hormone for total reassurance.

Professional analysis in an accredited laboratory ensures rapid result delivery.

The Vitall Thyroid Function nurse or clinic test kit includes a Thyroid Stimulating Hormone test and is available for just £59.00.

Tests which include a Thyroid Stimulating Hormone test:

Health is in your hands
Health is in your hands
Take Control Of Your Health | Home Blood Testing Services

Thyroid Function Test Kit

Thyroid Function test kit
Thyroid Function Home Test Kit UK

Thyroid Function Test Kit

Assess thyroid function and indicate abnormal thyroid activity

£59.00

View Full Details ›
Health is in your hands
Health is in your hands
Take Control Of Your Health | Home Blood Testing Services

Thyroid Function & Autoimmune Reaction Test Kit

Thyroid Function & Autoimmune Reaction test kit
Thyroid Function & Autoimmune Reaction Home Test Kit UK

Thyroid Function & Autoimmune Reaction Test Kit

Assess thyroid function and indicate abnormal thyroid immune activity

£89.00

View Full Details ›

What if Thyroid Stimulating Hormone Results Are High?

High TSH levels are often linked to an underactive thyroid gland (hypothyroidism). Interpretation is usually made alongside other thyroid hormone levels to indicate the degree of underactivity. Extremely rarely, a pituitary mass can secrete TSH even when T4/T3 levels are high.

Abnormal thyroid function can have a wide range of effects on the body and is often reviewed further to clarify the cause. Where treatment is used, it is commonly with daily hormone replacement therapy to raise abnormally low levels of natural thyroid hormones in the body.

What if Thyroid Stimulating Hormone Results Are Low?

Low TSH is most commonly linked with an overactive thyroid gland (hyperthyroidism). Low TSH can also occur after damage to the pituitary gland, such as following pituitary surgery.

Abnormal thyroid function can have a wide range of effects on the body and is sometimes reviewed further to clarify the cause.

TSH can be appropriately low when T4/T3 levels are high (hyperthyroidism). It can also be low in people using thyroid replacement therapy for an underactive thyroid. Depending on the wider context, this finding may be monitored without changes or may be discussed further.

Who Should Take This Test?

Measure your Thyroid Stimulating Hormone levels and assess thyroid function and indicate abnormal thyroid activity with a Thyroid Function nurse or clinic finger-prick bloodtest kit

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

This Thyroid Function Test is advised if you:

  • 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.

Other Biomarkers Often Tested With Thyroid Stimulating Hormone

Urine, swab or bood test. This test is available to buy online Free Thyroxine
Urine, swab or bood test. This test is available to buy online Thyroid Stimulating Hormone
Urine, swab or bood test. This test is available to buy online Triiodothyronine

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