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Thyroid Stimulating Hormone Blood Test

Thyroid Stimulating Hormone Blood Test


An entry-level test for thyroid function, which measures the amount of thyroid stimulating hormone (TSH) in the blood.
Blood sample 1 biomarker included Results estimated in 2 working days from sample receipt at lab
Thyroid Stimulating Hormone Blood Test
Thyroid Stimulating Hormone Blood Test
Thyroid Stimulating Hormone Blood Test
Thyroid Stimulating Hormone Blood Test
Thyroid Stimulating Hormone Blood Test

Is it for you?

Do you have symptoms like feeling cold all the time, struggling to lose weight, constipation and dry skin which you think might be caused by an underactive thyroid? Or are you experiencing the opposite, feeling hot, losing weight and feeling like your heart is racing? This test is a simple and inexpensive thyroid screen which will help identify whether an underactive or overactive thyroid is causing your symptoms.

What's included?

Biomarker profile

  • Thyroid Hormones

Thyroid Hormones (1 Biomarker)

Special instructions

Please take your sample in the morning. Do not take biotin supplements for 2 days prior to this test. If you are taking prescribed biotin you should discuss this with your doctor.

From the expert

The main role of the thyroid is to produce key hormones that affect almost every cell in the body. Thyroid hormones thyroxine (T4), and triiodothyronine (T3) are vital in regulating the rate at which the body uses energy. Thyroid stimulating hormone (TSH) is produced in the pituitary gland and regulates the production of T3 and T4. It is often measured as a proxy for thyroid hormones T4 and T3 as when circulating hormones are low, TSH will be elevated, and when circulating hormones are high TSH will be low.

Raised levels of TSH can indicate that the thyroid is struggling to produce sufficient quantities of thyroid hormones and is underactive, whereas low levels can indicate that the thyroid is producing excess levels of thyroid hormones and is overactive. Symptoms of an overactive thyroid (hyperthyroidism) include heat intolerance, weight loss, heart palpitations and breathlessness, while common underactive thyroid (hypothyroidism) symptoms include fatigue, weakness, weight gain, slow heart rate and cold intolerance.

The TSH test is often the first test for evaluating thyroid function and/or symptoms of hyper or hypothyroidism.

Dr Sam Rodgers MBBS, MRCGP
Chief Medical Officer

Why take this test?

  • You want to assess your thyroid function
  • You want to monitor treatment of hypothyroidism and hyperthyroidism

Laboratories you can trust

Trusted by the NHS and private clinics alike, you can be sure of the highest testing standards from our UKAS accredited partner laboratories.

Dr Sam Rodgers - Chief Medical Officer

Expert advice with your results

Get trusted advice and comments from one of our doctors based on your results.

Your personal health centre

Your personal health centre

Discover the easy way to track your health through our online portal, View your results with doctor's advice, monitor any changes over time and see the improvements you can make to your health with simple lifestyle changes.

Questions? Let us help
Questions? Let us help

Questions? Let us help

Our customer care team is on-hand to help you find the test that's right for you. Get in touch via phone, live chat or email.


Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.