Thyroid Function Blood Test

Who should test: Those experiencing unexplained weight changes, constant tiredness, mood swings, or sensitivity to the cold.

Why: To check if your thyroid gland is overactive or underactive, ensuring your metabolism and energy levels are functioning correctly.

£39.00

At Home Sample Kit

Thyroid Function

£39.00

Fast test kit delivery
Easy at home fingerprick test
Accredited lab testing
Advanced Results Report

The thyroid gland regulates your metabolism, energy levels, and mood. When it’s out of balance, everything from your heart rate to your body temperature can be affected.

What we test: TSH (Thyroid Stimulating Hormone) and FT4 (Free Thyroxine).

Why take this test? If you feel constantly tired, are gaining or losing weight unexpectedly, or feel unusually sensitive to the cold, your thyroid may be underactive or overactive. This test helps confirm if your symptoms are hormonal.
Note: Certain supplements (like Biotin) can affect results; we recommend pausing these 48 hours before testing.

Categories: At Home Tests, Blood Testing Kits

Our simple step-by-step process

Buy

Choose online from our testing kits.

Receive

Receive your testing kit in 48 hours.

Send

Send your sample back to the lab.

Results

Receive your full results via email.

Buy Testing Kit Today

Easy Self Test

Fast & painless finger prick test to get your sample in just 60 seconds.

Lab Sample Testing

Tested by our expert lab team in as little once your sample arrives.

Review Your Results

Receive your full results with insights, guidelines and feedback.

Complete your health profile with our at-home kits

Health markers rarely act in isolation. Often, symptoms like fatigue or weight changes can be linked to multiple different systems in the body. To help you get the most accurate picture of your wellbeing, we have identified Related Blood Tests that complement one another.

By testing related markers together, you can rule out overlapping causes and ensure your path to improvement is based on comprehensive data.

Have a question about blood testing? We're here to help.

If you can't find the answer you're looking for, our clinical team is always on hand to provide expert guidance via a quick phone call or in-store chat. We regularly update these questions to ensure you have the most current information regarding our evolving range of diagnostic services and health products.

Each kit comes with easy-to-follow instructions and sterile lancets. You simply perform a quick finger-prick to collect a small amount of blood into the provided collection tube. It is a simple process that takes less than five minutes.

Yes. Your sample is analysed at the same UKAS-accredited laboratories used by the NHS. The collection method is different (finger-prick vs. venous draw), but the laboratory technology and clinical standards are identical.

For most tests, we recommend taking your sample on a Monday or Tuesday morning and posting it immediately. This ensures your sample reaches the lab and is processed during the working week, avoiding weekend postal delays.

This depends on the test. For Heart Health (Cholesterol) and Stress (Cortisol), we recommend fasting for 8–12 hours. For others, like HbA1c or Thyroid, fasting is not required. Specific instructions are included in every kit.

Once your sample arrives at our laboratory, results are typically available within 2 to 3 working days. You will receive a secure notification to view your results online.

Absolutely. Every result is reviewed by a qualified clinician. If your results show anything that requires urgent attention, our team will contact you directly to discuss the next steps.

Yes. We take data security very seriously. Your health data is encrypted and stored in compliance with GDPR and NHS digital security standards. We will never share your results with third parties without your explicit consent.

Don't worry, it happens! If you struggle to collect a sufficient sample, please contact our support team. We can provide tips for better blood flow or, if necessary, send out a replacement collection pack for a small fee.

Get Tested

Thyroid Function Blood Test