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Build your own test that's specific to your health needs, choosing from our wide range of Biomarkers.
Choose from 30+ markers
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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?
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
Magnesium (Serum) Blood Test
Results in 2 working days
1 Biomarker
Keep track of your magnesium levels with our at-home blood test. This essential mineral plays a crucial role in various bodily functions, from supporting muscle and nerve function to maintaining a healthy heart rhythm.
Analysed by
NHS Lab
NHS Lab
Tracked 24
delivery
delivery
Finger prick or venous collection
£45
What gets tested?
1 Biomarker
Blood sample collection options
How does it work?
When do I take the test?
We recommend you take this test first thing in the morning before breakfast (but after a big glass of water!). Ideally it should be taken the morning after a rest day.
Certified for quality & security
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How can a magnesium blood test help you?
This test checks the magnesium levels in your blood serum. 99% of the magnesium in your body is found in your bones, muscles and tissue, with the rest in your blood serum.
Checking your levels can help uncover the causes of symptoms related to high or low magnesium levels.
Symptoms of a magnesium deficiency include;
- Muscle weakness
- Fatigue
- Irregular heartbeat
- Nausea and vomiting
Symptoms related to high levels of magnesium in your blood include:
- Diarrhoea
- Nausea
- Stomach cramps
How to test for magnesium deficiency at home
Checking for a magnesium deficiency at home is easy with our finger prick blood test. It has everything you need to collect a small blood sample and send it back (for free) to our NHS labs for analysis.
It takes around 15 minutes to complete the test and once the sample has reached our lab, we aim to return your results within 2 working days.
You’ll be able to see your magnesium levels, as well as where they should be for your age and gender.
Benefits of magnesium
Magnesium is an essential mineral that plays an important role in over 300 reactions in the body. You should get most of the magnesium you need from your diet, but you can also get magnesium supplements.
Magnesium is needed for:
- Muscle function
- Nerve function
- Bone health
- Heart health
- Energy production
- Blood sugar control
- Digestive health
It can also be helpful for pregnant women, helping with foetal development – especially bone and nervous system development.
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 Magnesium (Serum) 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
Results in 2 working days
Looking to improve your diet and get a better understanding of your overall health and nutrition? Nutricheck home blood test can help.
14 Biomarkers
£109
Or 3 interest-free payments of £36.33
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
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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.
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 Magnesium (Serum) Blood Test
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Magnesium (Serum) Blood Test