How soon will the test arrive?

If you order your test before midday on a Monday to Friday then your kit will be dispatched the same day. All our kits are sent out via Royal Mail first class post, so it should be with you within 1-2 working days.

When will I get my results?

We aim to deliver your results within 2 working days of your blood sample arriving at our lab.

How do I view my results?

When you buy your test, we will ask you to create an account with us during checkout. This will give you access to your own, secure health dashboard where you can view your results.

How secure is my data?

We have strict processes in place to ensure the protection of your data. Following GDPR the company also operates under tight legal rules about the sharing of data which ensures that data is only shared if it is crucial to the delivery of our service. For example, our doctors see customer results at the time of review, however, after review, access to results is withdrawn.

How do I find out my results are ready?

We keep you updated throughout the process by email and text message. We will let you know when your blood sample has arrived at our lab. Once the blood sample has been analysed one of our doctors will review your results. Once your results are ready, we will email you and send you a text message to let you know your results are ready for you to view in your health dashboard.

How do I take my blood sample

It’s easy to take a finger prick blood sample, but we know for some this can be a bit nerve-wracking, especially if you haven’t done it before. So, we’ve created a how-to video to help you collect a successful sample. But don’t worry if you don’t manage to get it right first time, just contact our customer support team at help@forthsupport.co.uk to request a replacement kit.

Can I have someone take my blood for me?

Yes. We offer two options if you do not want to do our finger prick test. The first is a home appointment where a nurse comes to your home to take a blood sample. The second is to visit a Phlebotomy clinic near you that offers a blood sample service. A blood sample will be taken from your vein and we will provide you with everything you need to give to the nurse to allow them to take the sample. The nurse will give you the blood sample to return to us using the pre-paid envelope provided.

Does a doctor review my results?

We have a team of doctors and nurses who look at all results and will comment on any results that are outside of the normal range for your age.

Can I download the results to share with my GP?

Yes, you can download your results from your health dashboard as a PDF to share with your GP.

Get a £5 voucher for you or to pass on when you order this test today.

Advanced Thyroid Blood Test

Name: Advanced Thyroid Blood Test
Brand: Forth
Price: 69 GBP
Availability: InStock
Rating: 4.2 (1168 reviews)

Check your thyroid function with our at-home blood test. Our advanced thyroid blood test checks 5 key markers, including TSH, T3 and T4, to help determine how your thyroid is functioning. If you’re experiencing symptoms of an underactive or overactive thyroid, such as a sudden change in weight, mood changes, difficulty sleeping or muscle weakness, this test is for you.

£69

+ £5 Voucher when you order today

Or 3 Interest-free payments

When do I take the test?

You can provide the sample for the thyroid check at any time but we don’t recommend checking your thyroid levels at times of illness as this may not give you an accurate result.

Certified for quality & security

Did you know?

Women are 10 times more likely to have an overactive thyroid gland than men

NHS Inform: About overactive thyroids

What does a thyroid blood test check?

Our advanced thyroid check is for anyone wanting to check if their symptoms – such as a sudden change in weight, mood changes, difficulty sleeping or muscle weakness – could be due to an overactive or underactive thyroid or a thyroid autoimmune condition. It’s also useful for monitoring an existing thyroid condition.

How to check thyroid function at home

Our blood test kits include everything you need to collect a blood sample from home, including detailed instructions and free return postage to our labs. Your results are analysed by our medical team, who will provide advice to help you understand how your thyroid is functioning.

What causes an underactive thyroid?

An underactive thyroid, also known as hypothyroidism, can be caused by various factors. The most common cause is an autoimmune condition called Hashimoto’s thyroiditis. Other causes include certain medications, iodine deficiency, radiation therapy, pituitary gland disorders, and surgical removal of the thyroid gland.

What causes an overactive thyroid?

An overactive thyroid, known as hyperthyroidism, can have different causes. The most common cause is an autoimmune disorder called Graves’ disease. Other causes include thyroid nodules, excess iodine intake, inflammation of the thyroid, and certain medications.

Frequently asked questions

This is what our customers ask us most about this test. For more information, try our help centre.

What is the thyroid?

The thyroid is a gland in your neck that produces the hormones thyroxine (T4) and triiodothyronine (T3). These hormones regulate the activity of the cells and tissues in the body.

T3 is the biologically active hormone, with your body converting T4 into T3. This hormone controls the metabolism, the speed at which cells work. The more T3 produced or converted, the faster cells metabolise. The level of hormones produced by the thyroid gland are controlled by the pituitary gland, which releases thyroid stimulating hormone (TSH) to stimulate the thyroid.
What are the early warning signs of thyroid problems?
The early warning signs of thyroid problems can include:
- being sensitive to the cold or heat
- weight gain / weight loss
- constipation
- low mood
- muscle aches and weakness
- loss of libido
- mood swings
- issues sleeping
Check out further information on symptoms in our answers below.
What causes an overactive thyroid?

The most common cause of an overactive thyroid (hyperthyroidism) is a condition called Graves’ Disease. This is an autoimmune condition where your body releases antibodies that cause your thyroid to produce too much thyroid hormone.

Less common causes are thyroid nodules and medicines that increase the amount of iodine in your body.
What causes an underactive thyroid?

An underactive thyroid (hypothyroidism) is usually caused by your immune system attacking the thyroid gland and causing it damage. This reduces its ability to produce sufficient hormones.
What are the symptoms of an overactive thyroid?
The symptoms of an overactive thyroid include:
- Nervousness
- Changes in mood
- Hyperactivity
- Anxiety
- Fatigue
- Weakness
- Sleep disturbance
- Heat sensitivity
- Irregular heartbeat
- Swelling in your neck
What are the symptoms of an underactive thyroid?
The symptoms of an underactive thyroid include:
- Fatigue
- Feeling cold
- Depression
- Weight gain
- Muscle cramps and aches
- Low sex drive
- Brittle hair and nails
- Dry skin
- Irregular or heavy periods

Can I have someone take my blood for me?

Yes. We offer two options if you do not want to do our finger prick test. The first is a home appointment where a nurse comes to your home to take a blood sample. The second is to visit a Phlebotomy clinic near you that offers a blood sample service.

A blood sample will be taken from your vein and we will provide you with everything you need to give to the nurse to allow them to take the sample.

The nurse will give you the blood sample to return to us using the pre-paid envelope provided.
Does a doctor review my results?

We have a team of doctors and nurses who look at all results and will comment on any results that are outside of the normal range for your age.
Can I download the results to share with my GP?

Yes, you can download your results from your health dashboard as a PDF to share with your GP.

Learn how to export your results.

We are dedicated to supporting you on improving your health

Recommended by doctors

Dr Thom Phillips

Clinical Lead

BSc. (Hons) MSc. MB BCh. MRCGP. Dip SEM. PGCert (Diabetes)

Renee McGregor

Nutrition Lead

BSc (hons) PGDIP (DIET) PGCERT(sportsnutr) RD BASES

Dr Michael Cornes

Scientific Officer

Consultant clinical scientist, FRCPath, BSc Biochemistry, MSc Clinical Biochemistry, PhD Biochemistry

"An advanced thyroid test includes two thyroid specific antibodies - thyroglobulin and thyroid peroxidase. Thyroglobulin antibodies are linked to autoimmune thyroid diseases like Hashimoto's and Graves' disease, while thyroid peroxidase antibodies indicate inflammation. High levels of these antibodies suggest thyroid problems, helping in the diagnosis and management of thyroid disorders."

Dr Thom Phillips

We’re changing people’s lives

Easy to follow instructions. Would do another test as thyroid results were on the low side of normal.

Sandra

30 March 2023

I find Forth professional and forward-thinking with a bigger range of tests than more traditional healthcare providers in the UK. I think it is closer to what you can get from US providers.

Richard C

I wanted to get more information about my own health instead of using the NHS who just test for a specific reason. I also wanted better historical data to view changes over time as the NHS systems aren’t very good for that.

James W

Finding out what is going on inside your body is key, especially now that the NHS is in crisis. If we can take control of our wellness (and flag up potential problems early) that has got to be a good thing.

Vannesa C

I am very satisfied with your excellent service and I have recommended you to all my friends who are also very interested in your products.

Doris R

How it works

Getting the insights you need to improve your health has never been easier.

1. Choose your blood test

No need to wait for a GP appointment, choose from our wide range of tests which come with everything you need to take your sample and return to our lab.

2. Collect your sample

Take your finger prick blood sample at home, or choose to have your blood taken at a Superdrug health clinic or a nurse at home. Return to our NHS lab using our prepaid envelope.