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Calcium Blood Test

Original price £55.00 - Original price £55.00
Original price
£55.00 - £55.00
Current price £55.00

Take this test to help monitor calcium levels in your bloodstream which is an important mineral for building strong bones and teeth.

  • Biomarkers: 1
  • Turnaround: 1-2 days

Simple and accurate blood test from a laboratory you can speak to.

Step 1. Choose sample collection option

Currently selected option: HOME KIT via Royal Mail Tracked 24

  • Available everywhere in mainland UK.
  • Includes everything you need to take a safe and suitable blood sample in about 15 minutes.
  • Post the sample back to our laboratory via Royal Mail Tracked 24.

Re-test guarantee

Take control of your bone health with our Calcium Blood Test. By monitoring calcium levels in your bloodstream, this test provides important insights into the strength and integrity of your bones and teeth.

Ideal for those concerned about osteoporosis, bone fractures or enamel deficiencies, our test offers the clarity and reassurance you need through rapid, laboratory-analysed results. Without the hassle of a GP referral, simply collect your sample from home with an easy-to-use kit and receive rapid results with helpful insights.

With One Day Tests, you can be proactive about your bone health. Our combination of convenience, speed and accuracy puts you in the driving seat. Order a Calcium Blood Test kit today and take the first step towards resilience and confidence.

About the Calcium Blood Test

Calcium is the most abundant mineral in the human body and is essential for building strong bones and teeth. Over 99% of the body`s calcium is stored in the bones and teeth. The remaining 1% circulates in the bloodstream and plays vital roles in muscle contractions, nerve transmission, hormone secretion and blood clotting.

Low calcium levels may indicate potential bone disorders like osteoporosis and an increased risk of fractures. High calcium can also negatively impact bone and heart health.

This test measures total calcium concentration in the blood, helping identify hypo/hypercalcemia. It may be recommended for those concerned about bone health, enamel deficiencies or osteoporosis risk. It can also help monitor calcium levels if taking supplements or calcium-channel blocker medications.

1 Biomarker


    - Calcium


    Need more biomarkers? Check out our Corrected Calcium and Albumin Blood Test

Most of the biomarkers we offer in the "ready made" panels are also available separately. So if your favourite test panel is missing a biomarker you would like to have, no problem, you can add whatever you need to one of our standard panels using the "Pick-n-mix" options, such as this one.


    For most biomarkers our usual turnaround time is 24-48 hours, or less, from the time your sample is in our lab. We do not wait for all the results to complete before sending them to you, so you may start receiving results the same day for most cases, or as results become available.

    We are extremely proud of our very short turnaround times and a very efficient laboratory processes. Whilst we accommodate the shortest of time scales, with some results available within hours, for this particular test the usual turnaround time is:

    1-2 days

Doctor's notes

Hi, I am Dr. Adam Staten and here's my view on this test as a GP and Clinical Director at One Day Tests.

Calcium is a mineral that is found in dairy products, some green, leafy vegetables such as kale, and anything made with fortified flour. The body uses calcium to maintain the health of the bones and teeth, to help muscles contract, to ensure that nerve impulses are conducted properly, and to maintain the heart rhythm. An adult needs about 700mg of calcium a day. 

Levels of calcium in your blood are primarily controlled by a hormone called parathyroid hormone that is produced by a gland in the neck. The kidneys are also involved in calcium metabolism and healthy calcium levels also rely on normal levels of magnesium and vitamin D.

Measuring calcium with a blood test provides an objective picture of your calcium status. For those concerned about bone health, getting a baseline calcium reading is key. Routine testing allows you to monitor levels over time and catch any fluctuations early.

Red flag symptoms for the Calcium Blood Test

Even if all the blood tests are normal, you should see your doctor if you have any of the symptoms below.

  • Excessive thirst and urination
  • Unexplained bone pains
  • Progressive fatigue or weakness

Your Results and Health Dashboard

The results of your Calcium Blood Test will be emailed to you as a secured PDF file, ready for your GP and will also be uploaded to our Health Dashboard area of the website. It’s a unique and powerful tool, powered by our in-house clinical analysis research, to match your biomarkers across test panels and symptoms, as well as provide clinical commentary on all individual biomarkers you tested for.

The health dashboard will also provide "panel level" commentary - a birds eye view of the biomarkers that were tested. This feature allows you to view your test results and clinical commentary, and compare them to previous results, giving you a clear understanding of how your health is progressing.

By using the Health Dashboard, you can identify changes in your biomarkers and make necessary adjustments to your lifestyle. This added value is immense, as it empowers you to monitor your health and make informed decisions about your well-being.

It's free and is available with all of our tests.

Save on continuous monitoring with our subscription plan

The best way to look after your health is to do so regularly. This is easy to do with our continual monitoring plans which give you a discount on future blood tests. You choose the frequency and we'll do the rest.

When you purchase a subscription, we will deliver your home test kits or allow you to book appointments in line with your chosen frequency. You will be able to track your biomarkers over time in our powerful Health Dashboard, where results will be automatically updated for you. There is a minimum of 3 tests with any subscription, after which you can pause/restart/cancel at any time.

Special instructions

Hi, I am Stefania Brown, I am the Laboratory Manager at One Day Tests and here are the lab's special requests for the Calcium Blood Test.

There are no special instructions for this test, just ensure you are well-hydrated before taking it.

Venepuncture appointment - how to prepare

If you are coming into one of our clinics for the test, this is what you need to do before you arrive:

  • Drink plenty of water about an hour before the appointment.
  • Avoid coffee/tea/energy drinks. Water is good!
  • That’s it! We’ll do the rest.

Home test kit for Calcium Blood Test - how it works

Our blood test kits are simple and convenient.

The most important step in doing a blood test at home is to read the instructions very carefully. The process is very simple, but there are a few pitfalls you need to be aware of - you will save yourself a lot of time if you do it right the first time around!

  • Full printed instructions will arrive with your kit - please read them carefully.
  • Drink plenty before taking the sample and warm your hands up in the sink with warm water for a few minutes. This will make your blood flow much better.
  • Fill the tubes to the top line. We don’t need much blood; filling tubes to the top line is about 15 drops of blood.
  • Post the samples on the same day you take them, before midday, Monday to Thursday. If you post it any other time it might get to us late or be stuck at a sorting office over the weekend. You will then have to do it again.
  • Package the sample in the same box the kit came in. Otherwise, Royal Mail or DPD will reject it. The sample tubes go into a pouch, then into a cardboard box, and then into a return envelope. All of this is provided in the kit: please use it.

We look forward to receiving your sample in our lab!

How the finger prick home test kit for Calcium Blood Test works - from Dr. Adam Staten

Why choose us?

Hello! My name is Dr. Vinesh Mistry, I am part of the GP team here at One Day Tests and here is why you should trust us to test your blood.

We run our own regulated laboratories and our own accredited clinics. We manufacture our own approved home sample collection kits. Your results are looked after by our fantastic clinical governance team and our super-talented biomedical science team.

When you book your test with us - you book directly with the lab. This means accuracy and responsible duty of care, direct access to the provider and extremely fast turnaround times.

Finally, our customer services rock! You can ask the lab a question any time or you can speak to a real human. It's good to WhatsApp, email on or give us a call on 0845 527 07 67.

Frequently Asked Questions

Hi, I am Lana Nela, Lead Nurse, and here is what we are frequently asked about this test.

What are the signs of high or low calcium?

Low calcium can lead to muscle weakness, spasms, tingling and fatigue. High calcium may cause confusion, frequent urination, abdominal discomfort and changes in heart rhythm.

What causes abnormal calcium levels?

The parathyroid glands play a key role in calcium regulation. Overactive parathyroids raise calcium while underactive glands lower it. Kidney disease can also cause deficient calcium. Vitamin D is essential for proper calcium absorption and metabolism, so deficiency causes hypocalcemia. By testing calcium levels, issues can be identified early.

Does a calcium blood test require fasting?

No, fasting is not required for a standard calcium blood test. Calcium levels in the blood can fluctuate slightly throughout the day, but these minor variations are not significant enough to require fasting before a routine total calcium test.

Eating normal meals before the test will not impact the results. The only dietary restriction would be avoiding taking calcium supplements for at least 24 hours before the test, as supplement doses can temporarily boost calcium levels.

Why take this test?

Hi, I am Dr. Marco Esposito and here is why it's important to take this test.
  • You want to check your calcium levels
  • You want to see if your symptoms are due to a calcium deficiency/abundance.

Is this test right for you?

Hi, I am Sandeep Patel, I am the Laboratory Director at One Day Tests. Here are the symptoms that you may wish to address with this test.

This test is for people who would like to check that their calcium level is normal, particularly for those being treated for conditions that affect calcium metabolism or who are taking calcium supplements.


    Make your own test panel

Why blood tests are important.