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Creatinine Blood Test

Original price £39.00 - Original price £39.00
Original price
£39.00 - £39.00
Current price £39.00

Take this test to measure creatinine levels in your blood, providing valuable insights into your 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

Our convenient Creatinine Blood Tests can help you take control of your kidney health. Our test measures creatinine levels in your blood, providing valuable insights into your kidney function. Whether you're an athlete optimising performance, or you’re concerned about your well-being, this test is designed for you.

Track your kidney health effortlessly with our exclusive Health Dashboard, where you can analyse creatinine levels and key markers, accompanied by clinical commentary and "panel level" insights. This means you can make better-informed decisions and visualise your kidney function progression.

Save with our subscription plan for continuous monitoring and enjoy discounted rates on regular blood tests, whether home kits or clinic appointments. Prioritise kidney health while saving costs.

Trust our state-of-the-art laboratories, accredited clinics, and dedicated support. Book your Creatinine Blood Test today and embark on a journey to optimal kidney function.

About the test

Creatinine is a chemical compound that reflects your kidneys' ability to filter waste from your blood. By measuring creatinine levels in your blood, our test offers valuable insights into the efficiency of your kidneys.

Our Creatinine Blood Test kit is especially beneficial for athletes seeking to optimise their performance and recovery. By closely monitoring creatinine levels, a key marker of muscle health, you can fine-tune your training and reach new heights in your athletic pursuits.


1 Biomarker


    - Creatinine


    Need more biomarkers? Check out our Kidney Function 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.

What is a creatinine blood test?

Creatinine is a waste product created by your muscles that comes from the normal use of the body. Everyone has creatinine in their bloodstream.

A creatinine measurement, subsequently, is a measure of how well your kidneys are doing their job of filtering waste from your blood.

As creatinine is a chemical waste product, generated from energy-producing processes in your muscles, healthy kidneys should filter creatinine out of your blood.

After kidneys are done with it, creatinine exits your body as a waste product, via urine.

Creatinine Blood Test result reference ranges

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

Low creatinine levels mean something is affecting creatinine production in the body. This will often result from a person having low muscle mass or body weight. However, low creatinine levels may also indicate a person has chronic kidney disease, reduced kidney function, or malnutrition.

The symptoms that go with low creatinine levels depend on the underlying condition.

Low creatinine levels can be caused by a muscle disease, such as muscular dystrophy. Symptoms of a muscle disease include muscle weakness, muscle stiffness and pain, and decreased mobility.

It can also imply a liver condition. Poor liver function interferes with creatine production, which can cause low creatinine. Symptoms include jaundice, abdominal pain and swelling, and pale, bloody, or tar-coloured stools.

Since the breakdown of muscle tissue produces creatinine, low levels of this chemical waste often occur in people with low muscle mass. However, this doesn’t always mean there’s a serious medical problem.

You should discuss these results with your GP.

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

Possible causes of a higher creatinine level include kidney damage or kidney failure, kidney infection, reduced blood flow to the kidneys, and dehydration.

If you have high creatinine levels, general symptoms may include nausea, vomiting, fatigue, changes in urine colour and patterns, high blood pressure, chest pains, and muscle cramps.

Please discuss this result with your GP.

Red flag symptoms for the Creatinine Blood Test

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

  • Fatigue 
  • Swelling
  • Changes in how often you urinate
  • Change in, or loss of, appetite
  • Feeling nauseous
  • Itching

Your Results and Health Dashboard

The results of your Creatinine 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 Creatinine Blood Test.
  • Fasting: You may be asked to fast overnight before the test. This means avoiding food for a certain period before the test, typically from the evening before the test until the blood sample is taken.
  • Dietary considerations: It is advisable to avoid eating meat for a specific period before the test, as it can affect creatinine levels. Additionally, if you take a creatine supplement, you will likely need to stop using it prior to the 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 Creatinine 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 Creatinine 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.

Can creatinine levels be affected by medications or supplements?

Yes, certain medications and supplements can affect creatinine levels. It is important to inform us about any medications or supplements you are taking to ensure an accurate interpretation of the test results.

Can I interpret my creatinine levels on my own?

Interpreting creatinine levels requires medical expertise. Your GP can analyse the results in the context of your overall health and medical history to provide an accurate assessment of your kidney function.

Why take this test?

Hi, I am Dr. Marco Esposito and here is why it's important to take this test.
  • Diagnosing kidney disease if you exhibit signs or symptoms associated with it.
  • Screening for kidney disease if you have conditions such as diabetes, high blood pressure, or other risk factors.
  • Monitoring the treatment and progression of kidney disease.
  • Checking for potential side effects of medications that may impact kidney function or cause kidney damage.
  • Assessing the function of a transplanted kidney.

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 kidneys' crucial role in numerous bodily functions, the Creatinine Blood Test serves as a valuable component of a comprehensive health assessment.

As kidney disease frequently exhibits no symptoms during its initial stages, this test can aid in early detection and proactive management.

If you have a family history of kidney disease, you may find this test particularly relevant and beneficial.


    Make your own test panel

Why blood tests are important.