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Kidney Function Blood Test

Original price £35.00 - Original price £35.00
Original price
£35.00
£35.00 - £35.00
Current price £35.00

The kidney blood test is one of the most commonly performed tests by doctors and will let you know how well your kidneys are working. Kidney disease can cause abdominal symptoms such as loss of appetite or nausea.

  • Biomarkers: 4
  • 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

The kidney function blood test is a crucial tool used by healthcare professionals to evaluate your kidneys' health and performance. These organs play a key role in filtering waste, balancing electrolytes, and regulating blood pressure. This test, essential for assessing overall health, influences treatment decisions and measures your 'estimated glomerular filtration rate' (eGFR) to gauge filtering capacity.

Symptoms like decreased appetite or nausea can indicate kidney issues, but not all deviations from the normal range require immediate intervention. Nevertheless, discussing your test results with your GP for a comprehensive evaluation is highly recommended.

Harness the power of One Day Tests for your renal health with our highly accurate blood test for kidney function. With rapid results from our CQC lab, comprehensive biomarker analysis, and the convenience of home testing, we provide the insights you need with the speed and accuracy you deserve.

About the Kidney Function Blood Test

The kidneys are pivotal in executing several critical functions, such as expelling waste products from the bloodstream, managing blood pressure, and ensuring the balance of electrolytes within the bloodstream. They are, however, susceptible to harm from infections, both inherited and acquired diseases, toxins, and certain medications. Often, kidney disease remains asymptomatic in its initial stages, making it challenging to detect early on.

This assessment determines your 'estimated glomerular filtration rate' or eGFR, a crucial indicator of your kidneys' efficiency. The eGFR calculation considers creatinine levels alongside factors like age, ethnicity, and gender, to gauge kidney performance.

An eGFR above 90 is deemed normal, while values above 60 are usually acceptable. An eGFR below 60 typically indicates kidney disease. Although kidney disease can exist with a normal eGFR, a standard result provides peace of mind. It's important to note that eGFR can naturally decrease with age, so a lower score might not always signal a significant health issue. Understanding your eGFR is vital as it can influence medication choices and dosages, as well as inform strategies for managing cardiovascular risk and blood pressure.

4 Biomarkers

  1. KIDNEY FUNCTION

    - Sodium
    - Urea
    - Creatinine
    - eGFR

  2. UPGRADE

    Need more biomarkers? Check out the Advanced Kidney Function Blood Test.

  1. TURNAROUND TIME

    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 kidneys are pivotal in executing several critical functions, such as expelling waste products from the bloodstream, managing blood pressure, and ensuring the balance of electrolytes within the bloodstream. They are, however, susceptible to harm from infections, both inherited and acquired diseases, toxins, and certain medications.

This assessment determines your 'estimated glomerular filtration rate' or eGFR, a crucial indicator of your kidneys' efficiency. The eGFR calculation considers creatinine levels—a waste product in your blood—alongside factors like age, ethnicity, and gender, to gauge kidney performance.

An eGFR above 90 is deemed normal, while values above 60 are usually acceptable. An eGFR below 60 typically indicates kidney disease. Although kidney disease can exist with a normal eGFR, a standard result provides peace of mind. It's important to note that eGFR can naturally decrease with age, so a lower score might not always signal a significant health issue. Understanding your eGFR is vital as it can influence medication choices and dosages, as well as inform strategies for managing cardiovascular risk and blood pressure.

Red flag symptoms for the Kidney Function Blood Test

Even if your blood tests are normal, you should see a doctor if you have any of the symptoms below because they may be a sign of serious underlying illness:

  • 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 Kidney Function 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 Kidney Function Blood Test.

Please ensure you’re well-hydrated before taking this test.

If you have recently taken the antibiotic trimethoprim (usually for a urinary tract infection), delay taking this test for a couple of weeks.

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 Kidney Function 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 Kidney Function 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 hello@onedaytests.com 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 does it mean if my eGFR is low?

A low eGFR can occur for lots of reasons. eGFR can fall in the short term due to acute illnesses, particularly illnesses that result in dehydration such as diarrhoea and vomiting, or sometimes due to using some medications (for example, the antibiotic trimethoprim can cause a falsely low eGFR). A persistently low eGFR may represent a gradual decline in kidney function as part of ageing or underlying kidney disease. So, a low eGFR is normally repeated and, if it remains low, further investigations are usually started.

What are common causes of kidney diseases? 

There are numerous types of kidney disease but common causes of kidney disease are poorly controlled diabetes and high blood pressure.

Can this test tell which kidney has a problem? 

No, this test provides an overall assessment of kidney function. Often, if there is a problem with one kidney, the other kidney can adequately compensate. For example, people who have donated a kidney to someone else often have healthy kidney function.

Why take this test?

Hi, I am Dr. Marco Esposito and here is why it's important to take this test.
  • As part of an overall assessment of your health 
  • To check for unrecognised kidney disease 
  • To monitor kidney function if you already have a condition that might harm the kidneys, such as diabetes

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.

Given the crucial roles the kidneys play in maintaining overall health, incorporating a kidney blood test into any general health assessment proves to be immensely beneficial.

Kidney disease frequently presents no symptoms during its initial stages, making early detection challenging. This test, however, offers a proactive means to identify any potential issues at an early juncture.

This examination is particularly pertinent for individuals with a family history of kidney disease, providing an essential tool for early intervention and management.

  1. SYMPTOMS AND TAGS

    Blood in urine, Chronic fatigue, Erectile disfunction, Feeling sick, Headache, Insomnia/lack of sleep, Itchy skin, Muscle cramps, Need to wee often, Poor appetite, Shortness of breath, Swollen ankles, Swollen feet, Swollen hands, Tiredness, and Weight loss

Why blood tests are important.