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.

Included in the cost of your test is advice, interpretation and support from our functional medicine team on your results. Choose package options below. Video calls are 30 minutes and you are sent a link to book your call once your results are ready.

The Thyroid Function with Antibodies Blood Test checks 5 markers; your thyroid stimulating hormone (TSH), free T3 (FT3) and free T4 (FT4), as well as thyroid antibodies, for an in-depth picture of your thyroid health.

  • Lab test results & personalised written report = £125

  • Lab test results & 30 minute zoom call = £145

  • Lab test results & 30 minute zoom call & personalised written report following your call = £165

£125.00
 
 

Suitable for over 18’s only.

Once you purchase this test you will be posted a finger prick blood test kit to complete at home. Full instructions are provided but please ensure you take your sample before 10am and only post back to the labs Mon-Thurs. You should take this test before you take any medication or vitamin/mineral supplements. Do not take biotin supplements for two days before this test, discuss this with your doctor if it is prescribed. Your results will take around 5 working days.

This test includes thyroid-stimulating hormone (TSH), free thyroxine (FT4), and free triiodothyronine (FT3). By measuring the amount of thyroid hormone that is free or unbound to carrier proteins in the blood, you can get a better picture of how much thyroid hormone is available to your cells. Additionally, this test also includes tests for thyroglobulin and thyroid peroxidase antibodies.

Many thyroid-related conditions are caused by autoimmune diseases. Your risk for this is raised if you or a family member has a history of autoimmune disease. Our test looks for specific thyroid antibodies, which can indicate that your thyroid is under attack by your immune system.

The two main autoimmune conditions that affect the thyroid are Hashimoto's thyroiditis (which causes hypothyroidism) and Graves' disease (which causes hyperthyroidism). While there isn’t a cure for either of these, they can be managed with the right treatment plan – so getting tested is important

View Sample Instructions
Article on Thyroid Health
Guide to supplements for thyroid health

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.