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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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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?
1 Biomarker
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
Vitamin B12 Blood Test
Results in 2 working days
1 Biomarker
If you're feeling tired and low on energy, you could have low B12 levels. Our Active B12 blood test is the most accurate way to measure the amount of vitamin B12 that is available for the body to use, helping to identify any deficiency that could be causing your symptoms.
Analysed by
NHS Lab
NHS Lab
Tracked 24
delivery
delivery
Finger prick or venous collection
£50
3 Interest-free payments Learn more
What gets tested?
1 Biomarker
Blood sample collection options
How does it work?
Certified for quality & security
As seen in
What does a vitamin B12 test check?
A B12 vitamin deficiency can make you feel extremely tired and lacking in energy. Taking this Active B12 home blood test is the best way to identify how much vitamin B12 is available for your body to use. It’s different from a total B12 test that measures the total amount of B12 stored in the body.
How to check vitamin B12 levels at home
We’ve made our vitamin B12 blood test easy to do from the comfort of your home. The kit contains everything needed to collect a small amount of blood and post it back to our labs for analysis. You’ll get the results within 2 working days of your sample reaching our labs, along with comments and advice from our medical team.
What causes vitamin B12 deficiency?
Vitamin B12 deficiency can result from factors such as a bad diet, malabsorption due to conditions like pernicious anaemia or gastrointestinal disorders, certain medications that interfere with absorption, or insufficient production of intrinsic factors needed for B12 absorption in the stomach.
What's the difference between active B12 and total B12?
Active B12, or holotranscobalamin, is the biologically active form of vitamin B12 that is readily available for cellular uptake. Total B12 includes both active B12 and inactive forms (bound to haptocorrin). Measuring active B12 provides a more accurate assessment of B12 status and potential deficiencies.
Vitamin B12 Blood Test, recommended by our doctors
"B12 is crucial for making red and white blood cells, repairing cells, and synthesising new DNA. It can't be produced in the body and must be supplied by the diet. Foods rich in vitamin B12 are usually animal based, so this test is particularly useful if you're following a vegetarian or vegan diet. We focus on the active form of B12 giving greater insight into your functional levels."
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 Vitamin B12 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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Nutrition & Vitamin Deficiency Blood Test
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Looking to improve your diet and get a better understanding of your overall health and nutrition? Nutricheck home blood test can help.
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Or 3 interest-free payments of £36.33
Vitamin B12 Blood Test
Results in 2 working days
Check if your low energy and fatigue could be due to a lack of vitamin B12 with our Active B12 home blood test.
1 Biomarker
£50
Or 3 interest-free payments of £16.66
Baseline Blood Test
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Per test
Flexible subscription - Cancel anytime
- 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 is vitamin B12 good for?
Vitamin B12 (cobalamin) is a vitamin that ensures the correct production of red blood cells and DNA – so it’s rather important! Because of its role in the production of red blood cells, individuals low in B12 can feel a boost in their energy.
What are vitamin B12 injections?
Where individuals are deficient in vitamin B12, they may be prescribed a B12 injection to resolve the deficiency.
What foods contain B12?
B12 is readily available from animal-based foods, such as:
- meat
- poultry
- fish
- eggs
- dairy products
A number of foods are also fortified with B12, such as cereals.
What are the symptoms of low B12 levels?
The symptoms of low B12 include:
- headaches
- palpitations
- loss of appetite
- indigestion
- diarrhoea
- changes in cognitive ability such as: forgetfulness, making decisions, and understanding
- a painful or red tongue
- shortness of breath or rapid breathing
- numbness
- muscle weakness
- low mood and depression
- issues with balance
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 Vitamin B12 Blood Test
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