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Our Cambridge clinic is opening its doors on the 30th of April. Book now!

Corrected Calcium and Albumin Blood Test

Original price £59.00 - Original price £59.00
Original price
£59.00 - £59.00
Current price £59.00

A more accurate measure of Calcium levels, taking Albumin into account and producing a Corrected Calcium measure. This is the preferred test for measuring Calcium.

  • Biomarkers: 3
  • 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

About the test

This blood test tells you the level of calcium in your blood. It includes two measurements, one is a direct measure of calcium and the other is the "corrected calcium" which depends on the level of the protein albumin in the blood. The corrected calcium is a better reflection of the calcium that is free and available in the blood. In healthy people, the numbers are often very similar.

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.

This test will measure your calcium level as well as your albumin level and give you a useful calculation of corrected calcium as per:

Corrected Ca = [0.8 x (normal albumin - your albumin)] + Ca level

The normal albumin level is defaulted to 4 mg/dL Standard Units or 40 g/L if using SI Units.

3 Biomarkers


    - Calcium
    - Albumin
    - Corrected calcium


    Need more biomarkers? Check out our Essential All Systems Blood Test


    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.

The vast majority of the calcium in our body is held in our bones but most of the rest is circulating in our bloodstream. Calcium is essential for the conduction of nerve impulses, maintenance of the heart rhythm, muscle contractions, and blood clotting. 
Low levels of calcium can cause weakness, fatigue, muscle cramps and spasms, and tingling and numbness in the fingers and around the mouth. High levels of calcium can cause confusion, excessive thirst, abdominal pain, palpitations and depression. 
When we measure calcium, we often make a correction for albumin levels. This is because some calcium is bound to albumin in the blood and therefore, if your levels of albumin are higher or lower than normal, the result of the calcium blood test can be misleading. In healthy people, the difference between the two readings will be minimal.

Red flag symptoms for the Corrected Calcium and Albumin 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 Corrected Calcium and Albumin 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 Corrected Calcium and Albumin Blood Test.

There are no special instructions for this test.

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 Corrected Calcium and Albumin 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 Corrected Calcium and Albumin 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 symptoms of abnormal calcium levels?

Low levels of calcium can cause weakness, fatigue, muscle cramps and spasms, and tingling and numbness in the fingers and around the mouth. High levels of calcium can cause confusion, excessive thirst, abdominal pain, palpitations and depression. 

What causes abnormal calcium levels?

Calcium metabolism is in large part controlled by small glands in the neck called the parathyroid glands. If these glands become overactive it can cause calcium levels to rise. If they are underactive then calcium levels can be low. Calcium levels can also be low in advanced kidney disease. Calcium metabolism is intimately linked to vitamin D levels and low vitamin D is a common cause of low calcium.

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.
  • You want to see if albumin is at normal levels and hence the corrected calcium calculation

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.


    Chronic fatigue, Fainting, Fatigue, Muscle cramps, Nausea, Tingling, Vomiting, Weak or brittle fingernails, and Weakness

Why blood tests are important.