Thyroid Blood Test with Antibodies – Check for Underactive or Autoimmune Thyroid
Thyroid Blood Test with Antibodies – Check for Underactive or Autoimmune Thyroid

Thyroid Blood Test with Antibodies – Check for Underactive or Autoimmune Thyroid

Package Options
 

Struggling with low energy, mood swings, weight changes, or always feeling cold? The Thyroid Function Blood Test with Antibodies checks your TSH, Free T3, Free T4, and thyroid antibodies (TPO and TGAb) to assess both thyroid function and autoimmune activity. A simple finger prick sample helps uncover common causes of fatigue, hair thinning, and hormonal imbalance.

✅ Checks TSH, Free T3, Free T4 and thyroid antibodies (TPO & TGAb)
✅ Ideal for identifying underactive thyroid or Hashimoto’s symptoms
✅ Receive personalised dietary, supplement and lifestyle recommendations from our expert team.

THIS TEST CAN NOT BE SHIPPED OUTSIDE UK.

What’s included

The test fee covers expert guidance, full result interpretation and ongoing support from our functional medicine team. Select your preferred package below. Video consultations last 30 minutes; a booking link will be sent once your results are ready.

Ordering for more than one person?
Please set the quantity to 1 per individual so that we can capture a complete medical history for each household member. You can keep adding multiple tests to the same basket as long as patients reside at the same address. For multiple tests for the same patient you only need to complete the patient form once.

Test information

The Thyroid Function with Antibodies Blood Test measures five key markers—TSH, free T3 (FT3), free T4 (FT4), and two thyroid antibodies—to provide a comprehensive assessment of your thyroid health.

Prices

  • Lab test results & personalised written report = £135
  • Lab test results & 30 minute zoom call = £155
  • Lab test results & 30 minute zoom call & personalised written report following your call = £175

All prices are in GBP and include VAT where applicable.

£135.00
 
 

Once you purchase this test, you’ll receive a finger-prick blood collection kit to complete at home. Full instructions are included, but please ensure you take your sample before 10am and return it to the lab Monday through Thursday only. This test should be taken before any medications or supplements, and you must avoid biotin supplements for at least two days prior. If biotin is prescribed, consult your doctor before pausing. Results are typically available within 5 working days.

This test measures TSH, free T4 (FT4), and free T3 (FT3)—the active forms of thyroid hormone not bound to proteins in the blood—providing insight into the amount of hormone available to your cells. It also includes thyroglobulin and thyroid peroxidase antibodies, which help detect autoimmune thyroid conditions.

Many thyroid disorders are autoimmune in nature, particularly if you or a family member has a history of autoimmune disease. This test identifies key antibodies that may indicate your immune system is attacking your thyroid.

The two most common autoimmune thyroid conditions are Hashimoto’s thyroiditis (linked to hypothyroidism) and Graves’ disease (linked to hyperthyroidism). While neither has a cure, both can be effectively managed with the right treatment—making early detection crucial.

Suitable for over 18’s only.

View Sample Instructions
Article on Thyroid Health
Guide to supplements for thyroid health
Thyroid health
5 Essential Nutrients for Thyroid Function

Frequently asked question

In addition to your lab report we provide the following options which are INCLUDED in the package prices:

A) Follow up personalised written report produced by our clinical team highlighting dietary and lifestyle advice plus links to supplement protocols, specific doses and any further testing requirements. We use the patient information you provide us at checkout along with your results to compile personalised action points for you.

OR

B) Follow up 30-minute video call to discuss your results and answer any questions you have. Once the lab has completed your results you will be sent these via email with a link to book a time and day online. You will also then be given the option to upgrade your 30-minute call to a 45-minute call for an additional £30 if you wish. During the call your practitioner will explain the results in more detail and what they mean for you. After your call you are sent a personalised list of supplements & the dose your practitioner advises with links to purchase from our supplements store.

OR

C) Both Zoom call and written report with personalised next steps (Zoom call is first and written report follows).

Thyroglobulin antibodies

This test looks for antibodies to thyroglobulin, a protein which is specific to the thyroid gland. Under normal circumstances it does not enter the bloodstream, but if your thyroid is inflamed or under attack from the body's own immune system, then thyroglobulin can be secreted and antibodies detected. Most cases of thyroid disease are caused by an autoimmune condition where the thyroid gland is attacked by the body's own immune system. This can cause the thyroid gland to produce more thyroid hormone (as in the case of Graves' disease) or to produce less as the cells in the thyroid gland are gradually destroyed (as in the case of Hashimoto's thyroiditis).

Thyroid peroxidase antibodies

Thyroid peroxidase is an enzyme which is produced in the thyroid gland and is important for converting T4 to the biologically active T3. This test looks for antibodies to thyroid peroxidase which indicates that the body's immune system is attacking the thyroid gland and impairing its function.

TSH

Thyroid stimulating hormone (TSH) is produced in the pituitary gland in order to regulate the production of thyroid hormones thyroxine (T4) and triiodothyronine (T3) by the thyroid gland. If thyroid hormones in the blood are low, then more TSH is produced to stimulate the thyroid gland to produce more of them. If thyroid hormone levels are high, then the pituitary produces less TSH to slow the production of thyroid hormones. If TSH is too high or too low, it normally signifies that there is a problem with the thyroid gland which is causing it to under or over produce thyroid hormones. Sometimes a disorder of the pituitary gland can also cause abnormal TSH levels.

Free T3

Triiodothyronine (T3) is the more active of the two thyroid hormones produced by the thyroid gland. Most T3 is bound to protein in the blood. Free T3 measures the level of T3 that is free, or unbound to protein, and is available to regulate metabolism.

Free thyroxine (T4)

Thyroxine (T4) is one of two hormones produced by the thyroid gland. It works to speed up the rate of your metabolism. Most T4 is bound to carrier proteins in the blood – it is only the free, or unbound, T4 that is active in the body, which is measured in this test. Free T4 is the less active of the two main thyroid hormones. To have an impact on your cells it needs to convert to the more active T3 when your body needs it.