Thyroid Blood Test
Original price was: £39.00.£29.99Current price is: £29.99.
The Thyroid Blood Test helps monitor your thyroid function, allowing you to optimize hormonal levels. Thyroid hormones play a crucial role in regulating various bodily functions, including metabolism, energy production, and mood. This test can help detect thyroid imbalances such as hyperthyroidism or hypothyroidism, ensuring proper thyroid health and overall well-being.
Suitable for adults 18 years of age and above.
What does it test for?
- Thyroid Stimulating Hormone (TSH)
- Free Triiodothyronine (FT3)
- Free Thyroxine (FT4)
3 biomarker(s)
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Biomarkers
Thyroid Stimulating Hormone (TSH)
Free Thyroxine (FT4)
Free Triiodothyronine (FT3)
Information
Hypothyroidism
Rapid weight gain
Fatigue and tiredness
Muscle weakness and joint stiffness
Depression or mood swings
Irregular or disturbed menstrual cycles
This test helps assess thyroid hormone levels to diagnose potential thyroid imbalances and guide appropriate treatment for managing symptoms.
Additional Insight from Dr Sameer Nakedar, MBBS, MRCGP, PGCert
In contrast, underactive thyroid (hypothyroidism) often shows high TSH levels, which attempt to stimulate the thyroid to produce more thyroid hormones. T4 and/or T3 levels are usually low but can occasionally be normal. Symptoms of hypothyroidism include weight gain, fatigue, dry skin, hair thinning, constipation, depression, muscle cramps, irregular periods, and cold intolerance.
Hyperthyroidism
Hyperactivity and anxiety
Insomnia or disturbed sleep cycle
Muscle weakness and joint stiffness
Irregular heart rate
Weight loss
This test helps assess thyroid hormone levels to diagnose potential thyroid disorders.
Additional Information
A thyroid blood test is a simple test that evaluates thyroid hormone levels, helping diagnose thyroid disorders like hypothyroidism and hyperthyroidism. It’s also used to monitor treatment effectiveness for these conditions. Symptoms of hypothyroidism include fatigue, weight gain, and constipation, while hyperthyroidism symptoms may include weight loss, anxiety, and tremors.
The test involves a small blood sample taken from a vein in your arm, which is sent to a lab for analysis. The results will help your doctor determine if you have a thyroid disorder and what type it may be, guiding the best treatment plan. It’s crucial to follow your doctor’s treatment recommendations to avoid serious health complications.
A healthy thyroid keeps a person hale and hearty
The thyroid gland is a vital part of the endocrine system, playing a crucial role in regulating heart rate, metabolism, brain function, and bone growth. To maintain overall health and well-being, it’s important to prioritize regular thyroid checkups. A healthy thyroid is essential for keeping your body functioning optimally, and early detection of any thyroid-related issues can help you stay ahead of potential health concerns. Regular monitoring is key to ensuring that your thyroid remains balanced and healthy.
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This thyroid function test can help you understand if your thyroid function is normal, overactive, or underactive.

Dr Sameer Nakedar
MBBS, MRCGP, PGCert
How to take a Thyroid Blood Test
Collecting a blood sample for your finger prick home test is simple and easy to do. Watch the video below for step-by-step instructions on how to perform the test at home.
How Welzo Home Tests Work
1. Pick your home test
2. Take your test
3. Results within 48 hours
Thyroid Blood Test Information
Specification of Thyroid Blood Test
Test Name: Thyroid Blood Test
Also Known As & Related Tests: Thyroid Function Test, Thyroid Panel, TSH Blood Test, Thyroid Hormone Blood Test, Free T4 Blood Test, Total T4 Blood Test
Biomarkers: Thyroid Stimulating Hormone (TSH), Free Thyroxine (FT4), Free Triiodothyronine (FT3)
Test Tube: SST (Gold Microtainer)
Brand: Welzo
Turnaround Time: Approximately 24 Hours
Test Kit Marking: MHRA/UKCA Certified
Location of Lab: United Kingdom
Lab Test Ranges: [To be provided based on specific test results]
What does a Thyroid Blood Test for?
Thyroid Stimulating Hormone (TSH)
Free Thyroxine (FT4)
Free Triiodothyronine (FT3)
These biomarkers help evaluate the function of the thyroid gland, identify thyroid imbalances such as hyperthyroidism or hypothyroidism, and monitor treatment progress.
Are Thyroid Blood Tests available on the NHS?
FAQs
What is a normal thyroid blood test result range?
Thyroid-stimulating hormone (TSH): 0.4 to 4.0 mIU/L
Free thyroxine (T4): 0.8 to 1.8 ng/dL
Free triiodothyronine (T3): 2.3 to 4.2 pg/mL
If your results fall outside these ranges, it doesn’t necessarily indicate a thyroid disorder. It’s important to consult with your doctor to interpret your results and decide if further testing is needed.
When should you have a thyroid blood test?
If you have symptoms of a thyroid disorder, such as fatigue, weight changes, or mood swings.
If you have risk factors for thyroid disorders, such as a family history or previous thyroid issues.
If you’re taking medication that can affect thyroid function, like certain antidepressants or lithium.
A thyroid blood test helps to evaluate thyroid health and guide further treatment if needed.
Where do I send my sample?
You will receive a free return label to send your health test samples back to our lab for analysis. Clear instructions, including return details, will be provided via email to ensure a smooth and hassle-free process.
What do I need to do before my test? i.e. fast, no drinking, etc
If fasting or limiting alcohol intake is required before your blood test, we will send you personalized instructions via email after your order is placed. However, most tests can be taken without the need for fasting.
When will I get my results/how will I receive my results?
Results are typically processed within 2–3 working days. If a sample is sent over the weekend (which we do not recommend), you will receive your results within 2–3 days from the following Monday. Once your results and personalized report are ready, you will receive an email notification with instructions to log in to the Welzo online platform and view your results.
What can affect thyroid test results?
Medications: Certain medications, such as birth control pills, heart medications, or corticosteroids, may impact thyroid hormone levels. It’s important to inform your doctor about any medications you’re taking prior to the test.
Medical Conditions: Underlying health issues like liver or kidney disease can alter thyroid hormone production and metabolism.
Pregnancy: Pregnancy can lead to fluctuations in thyroid hormones. Make sure to notify your doctor if you’re pregnant before undergoing the test.
These factors can all affect the accuracy of your thyroid blood test results, so it’s essential to provide your healthcare provider with complete information.
Who is most at risk of developing thyroid issues?
Women: Women are more likely to experience thyroid problems, particularly during pregnancy, after childbirth, or during menopause.
Family History: If thyroid disease runs in your family, your risk of developing it increases.
Other Medical Conditions: Individuals with conditions like diabetes, heart disease, or goiters (enlarged thyroid glands) are also at higher risk for thyroid issues.
Being aware of these risk factors can help with early detection and management of thyroid disorders.
What if my results show that I’m outside the normal range?
Where does my information go, and is the system secure?
Once you register with our platform, your details are securely encrypted and pseudonymized. Your sample will be sent to our lab and registered using an encrypted HL7 file (Health Level Seven International), a standard for exchanging and managing electronic health records (EHRs). To further protect your privacy, your data and sample will be pseudonymized, meaning an unidentifiable alphanumeric code will be applied to your account. This enhances the security and anonymity of your information.
