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Build your own test that's specific to your health needs, choosing from our wide range of Biomarkers.
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View all tests
Hormones & fertility 
Sexual health 
General health 
Cancer test 
Nutrition 
Mental health 
Sports Build your own
Build your own test that's specific to your health needs, choosing from our wide range of Biomarkers.
Choose from 30+ markers
Blood sample collection options
You can choose your preferred collection method when you checkout
Finger prick kit (FREE)
You can do this test at home without the need for a doctor. We'll send you everything you need to collect your sample and post it back to us. And it's all included in the cost. We've put together a video that covers the process, making it easy to check and track your health from home.
Home nurse appointment (+£60)
We'll arrange for a medical professional to visit your home and collect your sample. This is great if you're unsure on how it all works or have trouble collecting a sample. No need to book a doctor's appointment or visit a clinic, we'll send you everything you need to collect a sample and post it back to our labs.
Visit a partner clinic (+£45)
Once you've ordered your test, look out for an email from our phlebotomy partners containing information and a link to book your appointment. We'll send you everything the clinic will need to complete the sample and post it back to our labs.
Organise a nurse myself (FREE)
If none of the above options work for you, you can arrange your own medical professional to collect your sample. There is no additional charge for this. Once you've ordered your test, we'll send you everything you and your chosen medical professional will need to collect a sample and post it back to our labs.
Still unsure how it works? You can find more information on collection methods and the service we provide in our 'How it Works' section.
How does it work?
1. Collect your blood sample
It takes 5 minutes to collect a small sample of blood from your finger tip. Post it back to our labs using the Tracked-24 envelope included in your kit.
2. View your results
Your results will be sent to the Forth app within 2 working days, along with the optional doctors comment and detailed report.
3. Make improvements
The detailed report makes it easy to identify areas that need improving, make changes and track your progress.
What gets tested?
6 Biomarkers
Additional biomarkers can be added by personalising this test.
What are biomarkers?
Biomarkers are specific compounds we can detect in your blood sample that reflect different things about your health. Your test will tell you your levels for each of the above biomarkers, and whether they are in a normal range.
About flexible subscriptions
How does a subscription work?
When you purchase this test subscription plan, we will automatically send you another test kit in a few months. Don't worry - you have full control over when this will be, and you can change/cancel it anytime.
When you first purchase this test, you can choose your subscription options in the checkout. We do this, because we recommend taking multiple tests over time to track how your biomarkers change. You'll be charged per test kit (rather than monthly, for example).
Why subscribe to multiple tests?
One test will show you what areas you need to focus on, continued testing will help you learn how your training, diet and lifestyle is impacting your health.
How often should I test?
We recommend a follow up test 3 months after your first test, followed by a test every 6 months depending on your results, but its up to you!
Can I change what's tested in future tests?
Yes, you can tailor/customise subsequent tests (via your app) to focus on just the areas that need improving.
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Analysed by
NHS Lab
NHS Lab
Tracked 24
delivery
delivery
Personalised
GP advice
GP advice
Finger prick or venous collection
Tiredness & Fatigue Blood Test
Results in 2 working days
6 Biomarkers
Are you feeling tired all the time, low on energy or fatigued? Our test is a great place to start. It checks your thyroid, along with vitamin D, vitamin B12 and ferritin which all play a role in energy production. A thyroid condition or deficiency in these vitamins can leave you feeling tired or fatigued.
Analysed by
NHS Lab
NHS Lab
Tracked 24
delivery
delivery
Finger prick or venous collection
£85
3 Interest-free payments Learn more
What gets tested?
6 Biomarkers
Blood sample collection options
How does it work?
Certified for quality & security
As seen in
The average person spends 20 years in poor health. Take control - don't let that be you!
Powered by cutting-edge technology Forth's market leading app converts blood test results into simple real-world health scores, making insights about your health easy to understand and to act upon
Unlock your health scores
Translates biomarker results into health scores for reproductive and thyroid health
Personalised health targets
Triiodothyronine (T3, free)
Healthy
6.5 (pmol/L)
Next target 4.5 - 5.5 (pmol/L)
Get incremental, achievable targets based on your unique results, ensuring progress at every step
Focus where it counts
78
100
Thyroid health
GOODHealthCoach's smart algorithms identify the specific areas which will make the biggest impact on your journey to better health
Guidance for optimal health
78
100
Thyroid (T3 v T4)
GOOD
Although TSH is suppressed, T4 is in range. This suggests subclinical hyperthyroidism, which could indicate an intermediate situation either tending towards developing an overactive thyroid or the process of altering dose of medication to regulate a thyroid condition.
Get tailored advice which considers your gender, age, hormone treatments and menstrual cycle to help you reach optimal health
What this test measures
6 Biomarkers
Active B12
Active B12 measures forms of B12 which are available for direct use by the body. This is a more accurate measure of health than total B12. This vital vitamin has an important role in red blood cell production and helps prevent anaemia. It helps to boost energy, improve mood, and enhances cognitive function.
Vitamin D (25 OH)
Vitamin D is essential for healthy bones, immune function, muscle performance, energy, mood and reducing inflammation. It's primarily produced through sunlight exposure so people in the UK are more prone to deficiency than warmer countries. Vitamin D deficiency can lead to significant tiredness and lethargy.
Ferritin
A ferritin test measures the total level of iron stored in your body. Iron is crucial for energy production, immune function, cognitive health and muscle performance. Low levels can cause fatigue, weakness, low mood and lead to iron-deficiency anaemia. Women are more prone to low ferritin than men due to blood loss during the menstrual cycle.
Thyroid Stimulating Hormone (TSH)
Thyroid-stimulating hormone (TSH) regulates thyroid function by stimulating the production of thyroid hormones T3 and T4, which control metabolism and energy production. Women are more likely to develop thyroid disorders than men. Abnormal thyroid levels impact weight, energy levels leaving you feeling tired and lethargic.
Thyroxine (T4, free direct)
A thyroxine (T4) test is used to check that the thyroid is performing properly. An overactive thyroid can cause too much thyroxine to be released whilst an underactive thyroid can lead to too little. Abnormal levels can impact weight, energy, and mood. Free T4 measures the free or unbound levels of T4.
Triiodothyronine (T3, free)
Triiodothyronine (T3) is the active form of thyroxine (T4). High T3 levels may indicate hyperthyroidism, with symptoms such as fatigue, weight loss, irritability, and increased heart rate. Low T3 levels can suggest hypothyroidism, causing fatigue, weight gain, and muscle stiffness. Free T3 measures the free or unbound levels of T3.
What does a Tiredness & Fatigue blood test check?
This test is a great starting point to find out the cause of constant tiredness, low energy, and fatigue. Testing thyroid stimulating hormone levels, along with vitamin D, vitamin B12 and iron (ferritin) can identify or rule out some of the potential causes. If you want a more comprehensive check, we recommend our Advanced Energy Test.
How to test energy levels at home
You can test your energy levels and find out why you’re tired all the time from the comfort of your home with our Tiredness & Fatigue blood test. The test kit includes everything you need to collect a sample of blood from your finger and post it back to our labs for analysis. Our medical team will review your results, offering comments and advice based on your hormone levels.
Tiredness & Fatigue Blood Test, recommended by our doctors
"Our Tiredness & Fatigue Blood Test helps uncover underlying causes of persistent exhaustion. It evaluates factors like anaemia, thyroid function, and nutrient deficiencies. Identifying the root cause enables targeted treatment, addressing fatigue and restoring energy levels, so you can enjoy a more active life."
Dr Thom Phillips
Clinical lead
Meet our team of experts
Our team of specialist doctors, dieticians and biomedical scientists are here to help you be in the best of health.
How our Tiredness & Fatigue Blood Test works
Getting the insights you need to improve your health has never been easier.
1. Collect your blood sample
It takes 5 minutes to collect a small sample of blood from your finger tip. Post it back to our labs using the Tracked-24 envelope included in your kit.
2. View your results
Your results will be sent to the Forth app within 2 working days, along with the optional doctors comment and detailed report.
3. Make improvements
The detailed report makes it easy to identify areas that need improving, make changes and track your progress.
What's included in this test?
1x Yellow Tube
3x Lancets
1x Cleansing wipes
Plasters
2x Alcohol swabs
1x Return pouch
1x Tracked 24 return envelope
1x Lab request form
Blood sample kit
Results within 2 working days
Tracked 24 delivery & return
Secure health dashboard
NHS lab analysis
Doctor reviewed results
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Advanced Energy Blood Test
Results in 2 working days
Our Advanced Energy Blood Test checks a more comprehensive range of biomarkers to help indentify or rule out causes of low energy.
23 Biomarkers
£137
Or 3 interest-free payments of £45.67
Baseline Blood Test
Results in 2 working days
A general health blood test that checks bone health, heart, liver and energy levels, and nutrition.
25 Biomarkers
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Per test
Flexible subscription - Cancel anytime
Advanced Health Check
Results in 2 working days
A comprehensive health test that checks bone health, heart, liver and thyroid function, energy levels, nutrition, immune & hormone health.
39 Biomarkers
£184
Or 3 interest-free payments of £61.33
- Health scores calculated
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Frequently asked questions
This is what our customers ask us most about this test. For more information, try our help centre.
What causes low energy?
Low energy can be caused by a lack of sleep, stress, lifestyle factors like an unbalanced diet high in ultra-processed foods, hormonal changes, a vitamin deficiency or an under-active thyroid (hypothyroidism).
What vitamins give you energy?
The following vitamins and minerals are important factors in energy:
- B vitamins
- Vitamin D
- Vitamin C
- Ferritin
- Magnesium
Does perimenopause cause low energy levels?
When oestrogen levels drop sharply during perimenopause, this can have an impact on your energy levels.
Do female hormones affect tiredness?
The unique and complex fluctuation of female hormones has an impact on energy levels due to the importance these hormones have in the normal function of our body’s systems.
During perimenopause, reducing levels of various hormones can impact a woman’s levels of fatigue. It is important to check for hormonal imbalances on a regular basis.
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.
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.
Learn more about your data security.
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
Go to help center
What customers say about our Tiredness & Fatigue Blood Test
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