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Urea Blood Test

Original price £45.00 - Original price £45.00
Original price
£45.00 - £45.00
Current price £45.00

Elevated levels of urea in the blood may indicate kidney dysfunction, dehydration, or other conditions affecting kidney function.

  • 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

About the test

A Urea Blood Test from One Day Tests offers a convenient and accurate way to monitor kidney function from the comfort of your own home or via one of our clinics. If you have concerns about your kidney health or are experiencing symptoms such as frequent urination, swelling in the legs or feet, or fatigue, our Urea Blood Test can provide you with the answers you need.

With our state-of-the-art technology and CQC-regulated laboratory, you can trust the accuracy of your results. Our home test kits provide same-day or next-day results, allowing you to take control of your health quickly and easily. You can also come into one of our clinics to have your blood sample taken for you by one of our nurses. And with our powerful online Health Dashboard, which you will gain free access to, you can easily track your urea levels over time and take the necessary steps to improve your kidney health.

Order your Urea Blood Test home kit today and get the insight you need to make informed decisions about your kidney health. Our flexible subscription plans also allow for regular monitoring at discounted rates.

What is a blood test for urea?

A urea blood test measures the amount of urea nitrogen in your blood. Urea nitrogen is a waste product that forms when your body breaks down protein. A blood test can reveal important information about how well your kidneys are working, so if your urea blood test results are off the normal range, this could mean that either your kidneys or your liver may not be working properly.

1 Biomarker


    - Urea


    Need more biomarkers? Check out our Kidney Function 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.

Urea is produced by your liver and is a waste product of proteins being broken down. As with most body waste, it is cleared from your blood by the kidneys. Therefore, we can use this measurement as a measurement of your kidney function.

Reference ranges

If your indicative urea level is lower than the reference range for our laboratory:

Low urea levels are rare and usually not a concern on their own. They may be present in cases of malnutrition or severe liver disease, but additional symptoms would typically be evident. Low urea levels are also common during normal pregnancy.

If you are concerned or are experiencing symptoms, you should discuss these results with your GP.

If your indicative urea level is higher than the reference range for our laboratory:

It may be a sign of a very high protein diet or dehydration at the time of the test (which is why we recommend plenty of water before taking the blood sample!)

It can also mean a sign of kidney disease and should be investigated further.

Please discuss this result with your GP.

Red flag symptoms for the Urea Blood Test

Even if the blood test is normal, you should still see your doctor if you have any of the symptoms below. 

  • Swollen around the ankles, eyes or abdomen 
  • Lower than expected urine output 
  • Passing a lot more urine than normal 
  • In men; symptoms of difficulty passing urine, getting up more than usual at night to pass urine, or being unable to fully empty your bladder

Your Results and Health Dashboard

The results of your Urea 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 Urea Blood Test.

There are no special instructions for this test, just make sure 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 Urea 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 Urea 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 is a urea blood test normal range?

Results of the blood urea nitrogen test are measured in millimoles per litre (mmol/L). In general, around 7 to 20 mg/dL (2.5 to 7.1 mmol/L) is considered normal. However, normal ranges may vary depending on the reference range used by the lab and your age.

What causes high urea levels?

High blood urea nitrogen levels can be caused by a number of factors such as urinary tract obstruction, congestive heart failure or recent heart attack, gastrointestinal bleeding, dehydration, or shock.

Does this test identify which kidney is affected?

This test cannot pinpoint which kidney has an issue. In some cases, one kidney can compensate for a problem with the other kidney. For instance, individuals who have donated a kidney can still maintain healthy kidney function as the remaining kidney can compensate for the loss.

Why take this test?

Hi, I am Dr. Marco Esposito and here is why it's important to take this test.
  • To assess overall health and detect potential kidney problems early on
  • To monitor kidney function if there is an existing medical condition that could affect the kidneys, such as diabetes or high blood pressure
  • To check for dehydration
  • To ensure medication or lifestyle changes are not affecting kidney function
  • To monitor the progress or effectiveness of treatment for kidney disease or other conditions affecting the kidneys

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.
  • Changes in urination, such as frequency, colour, or smell
  • Swelling or puffiness in the legs, feet, or face
  • Fatigue or weakness
  • Loss of appetite
  • Nausea or vomiting
  • Confusion or difficulty concentrating
  • Trouble sleeping
  • Itchy or dry skin
  • High blood pressure
  • Unexplained weight loss or gain

    Kidney worry

Why blood tests are important.