Kidney Function Tests

We provide the most extensive and affordable kidney function tests available in the UK, find a full list of why it is important to get it checked and more.

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Why are kidney function test important?

At Harley Medic Global we believe that people should have a better understanding of their body needs to maintain a healthy lifestyle .  It is important to have your kidneys checked because you are unable to feel kidney disease. A kidney function test is particularly important for people who have diabetes, high blood pressure, or heart disease. These conditions can hurt your kidneys and potentially put your health at risk.

 Kidney disease can be treated however it is important that it is discovered earlier. The faster you are aware you have kidney disease, the quicker you can get treatment to help delay or potentially prevent kidney failure as by treating kidney disease it may also prevent heart disease. The primary goal for the treatment for Kidney disease is to keep your Glomerular Filtration Rate (GFR) from going down and to lower your urine albumin.

If you have a high blood pressure, having the frequent urge to urinate, there is blood in the urine, experiencing difficulty beginning urination, painful urination or swelling of the hands and feet due to a build-up of fluids in the body, these are symptoms indicating that you may have a problem in your kidneys. Though if you are experiencing one of the symptoms mentioned, it may imply it is not something serious. However if the symptoms are recurring, this suggest that your kidneys are not working properly. A kidney function test will help to determine what could be the cause of the symptoms. As a chronic kidney disease often has no symptoms in the early stages, it is essential that people at a higher risk of contracting it should be tested regularly.

Where and what is the kidney, and what does it do?

A human body have two kidneys on either side of your spine that are each approximately the size of a human fist. They’re located posterior to your abdomen and below your rib cage. 

Your kidneys play several vital roles in maintaining your health. One of their most important jobs is to filter waste materials from the blood and expel them from the body as urine. The kidneys also help control the levels of water and various essential minerals in the body. In addition, they’re critical to the production of: 

  • vitamin D 
  • red blood cells 
  • hormones that regulate blood pressure

Healthy kidneys remove wastes and excess fluid from the blood. If your doctor thinks that your kidney may not be working properly, you may need a kidney function tests. A kidney function test usually requires you to do both a blood and urine tests  to show how well the kidneys are doing their job and how quickly body wastes are being removed. Urine tests can also detect whether the kidneys are leaking abnormal amounts of protein, a sign of kidney damage. It has to be emphasise that if you have conditions such as diabetes or high blood pressure that could harm your kidneys, it is advice to have a kidney function test done to help doctors monitor these conditions.

What are kidney function tests? 

 Unlike most test which require just a blood sample, a kidney function test require both a blood and urine sample.  A kidney function test usually require a 24 hour urine sample and a blood test. The 2 tests would then indicate the kidney numbers. 

A 24 hour urine sample is a creatinine clearance test. It gives the doctor an idea of how much creatinine your body expels over a single day. BUN and serum creatinine tests require blood samples taken in a lab or doctor’s office.  A blood urea nitrogen (BUN) test measures the amount of nitrogen in your blood that comes from the waste product urea. Urea is made when protein is broken down in your body. Urea is made in the liver and passed out of your body in the urine. 

For the Urine test, on the day that you start the test, urinate into the toilet as you normally would when you wake up.

For the rest of the day and night, urinate into a special container provided by your doctor. Keep the container capped and refrigerated during the collection process. Make sure to label the container clearly and to tell other family members why it’s in the refrigerator. 

On the morning of the second day, urinate into the container when you get up. This completes the 24-hour collection process. 

Follow your doctor’s instructions about where to drop the sample off. You may need to return it either to your doctor’s office or a laboratory. It is essential that you follow the instructions to ensure the accuracy of the results.

The blood sample is more straightforward compared to the urine test. When you attend the clinic, there will be a certified nurse drawing the blood after they first tie an elastic band around your upper arm to make the veins stand out. The nurse would then proceed to clean the area over the vein and slip a hollow needle through your skin and into the vein. The blood will flow back into the test tube and will be sent for analysis. During the process, you may feel a sharp pinch or prick when the needle enters your arm. After the blood is drawn, the nurse will place gauze and a bandage over the puncture site after the test. It is normal if the area around the puncture develop a bruise over the next few days. However, you should not feel severe or long term pain, if you do experience this it is advisable for you to mention this to your doctor.



What would the kidney function test be checking?

A kidney function test usually require a blood test and an urine test. Some urine tests require only a couple tablespoons of urine. Other tests require collection of all urine produced for a full 24 hours. A 24-hour urine test shows how much urine your kidneys produce, can give an more accurate measurement of how well your kidney are working and how much protein leaks from the kidney into the urine in one day. A urinalysis can help to detect a variety of kidney and urinary tract disorders, including chronic kidney disease, diabetes, bladder infections and kidney stones. A urinalysis also known as a urine test can include three parts. First would be a visual exam where the urine sample will be looked at for the colour and clearness. Blood may make the urine look red or the colour of tea or even cola. Foamy urine can be a sign of kidney problems. It also includes microscopic examination of a urine sample as well as a dipstick test. A microscopic exam is a test where a small amount of urine will be looked at under a microscope to check for things that do not belong in normal urine that cannot be seen with the naked eye. Examples would be red blood cells, white blood cells (or pus cells), bacteria (germs), or crystal which are formed from chemicals in the urine and may eventually get bigger and become kidney stones. A dipstick is a thin, plastic stick with strips of chemicals on it which is  It is dipped into the urine.  The strips change colour if a substance is present at a level that is above normal.  . Some of the things a dipstick examination can check for include:

    • Acidity (pH) is a measure of the amount of acid in the urine. A pH that is above normal may be a sign of kidney stones, urinary infections, kidney problems, or other disorders.
    • Protein is an important building block in the body. Everyone has protein in their blood.  But it should only be in your blood, not your urine.  Your kidneys play a role in this process.  Healthy kidneys remove waste products and extra water from your blood, but leave behind the things your body needs, like protein.  When kidneys are injured, protein leaks into your urine. Having protein in your urine suggests that your kidney’s filtering units are damaged by kidney disease.
    • Glucose (sugar) is usually a sign of diabetes.
    • White blood cells (pus cells) are signs of infection.
    • Bilirubin is a waste product from the breakdown of old red blood cells.  It is normally removed from the blood by the liver.  Its presence in the urine may be a sign of liver disease. 
    • Blood can It can be a sign of an infection, a kidney problem, certain medicines, or even heavy exercise.  Finding blood in the urine requires further testing.  It does not mean you have a serious medical problem.

A urinalysis can help to detect many diseases before you feel symptoms. Finding and treating a problem early can help keep serious diseases from getting worse.

The blood test for a kidney function test measures the levels of a waste product called creatinine in your blood.

Your doctor uses your blood test results, plus your age, size, gender and ethnic group to calculate how many millilitres of waste your kidneys should be able to filter in a minute.

This calculation is known as your estimated glomerular filtration rate (eGFR).

Healthy kidneys should be able to filter more than 90ml/min. You may have CKD if your rate is lower than this. 

How our kidney function tests work?

We are here to transform the way the general public thinks about their health making it easier and more assessible for everyone. Currently, when someone feels sick they usually call their local GP and arrange an examination, this may or may not lead to a follow-up appointment with a specialist. This is a long and inaccurate process. Matters of your health is a pressing issue which must be dealt with as quickly and efficiently as possible. 

Therefore we have remove the inaccuracy and long waiting time by sending a kidney function test based on your needs directly to your house. These are then analysed by a lab directly. We then send you the cold hard facts of what your body are telling our lab specialists. We also offer a clinic services where you can have your kidney function test done hassle free no question asked. If you think you have problems with your kidneys, we are here to assist you every step of the way starting with a kidney function test. 

Remove the stress, time, and potential inaccuracies of human judgment by finding out what your body is telling you directly. 




1. Order Online Now

Place an order online using our secure checkout and receive a confirmation email with your order information. 

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2. Get Tested in 10 Minutes

We send the test directly to the comfort of your house. Here you will take a simple finger prick ,a small sample of blood for testing, a test tube for your urine and three strips. Send back the sample with our secure packaging. 


3. Get Results

Your sample is analysed and you’ll receive your results by email. Take control of your health, and find out what your body is telling you!

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                    I would like to express my heartfelt gratitude to the Harley medic team, I came for a private check and found out that my kidneys was not functioning as well as I thought. I have made some lifestyle changes and now I feel more assured that my health is in check.

Lenny Robinson

Kidney function

Let's Get Healthy!

It is time to pay attention to the kidney before it starts to fail. It is time to take a Kidney Function test .

Answers to Your Questions

Are there any other test to check your kidney function ?

On top of a urine and blood test to check your kidney function, there are other test use to assess the level of damage to your kidneys. These may include a kidney biopsy where a small sample of kidney tissues is removed using a needle and the cells are examined under a microscope for signs of damage. An ultrasound scan, MRI scan or CT scan are another test that can be use to see what the kidneys look like an check whether there are any blockages.

Can I take a kidney function test at home?

Yes, you can. We will send you a test kit to your house that would include a total of three dip stick that are intended for use to check for Creatinine, Protein and specific gravity in urine specimen as an aid in the diagnosis of kidney disease and problems. The test provides results by the visual comparison with the enclosed colour chart. If you obtain an abnormal result, repeat the test using another strip. The kit will also include a finger prick and an additional test tube which is use for the collection of a small amount of urine.

Can I take a kidney function test at your clinic?

Yes, we also offer in-clinic kidney function blood tests as previously mentioned. If you want to feel more assured you are in safe hands, you can use our in-clinic services by filling out the form attached to this page to request a private kidney function test.

How do I prepare for a kidney function test?

You may be asked to stop eating and drinking for 8 to 12 hours before the test. Tell your doctor about any medicines you take because some drugs might affect the test results. 

It can help to wear a T shirt or other short-sleeve top on the day of the test to make things faster and easier for the nurse who will be drawing the blood.

Maintaining kidney health is important to your overall health and general well-being. By keeping your kidneys healthy, your body will filter and expel waste properly and produce hormones to help your body function properly. We have listed some ways of having a healthy kidney:

  • Regular exercise can lower the risk of chronic kidney disease.  It can also reduce your blood pressure and boost your heart health, which are both important to preventing kidney damage.
  • Control your blood sugar, people with diabetes, or a condition that causes high blood sugar, may develop kidney damage.
  • Drink loads of fluids. Water helps clear sodium and toxins from your kidneys. It also lowers your risk of chronic kidney disease. People who have previously had kidney stones should drink a bit more water to help prevent stone deposits in the future.




What should I do after the kidney function test?

Regardless of the test results it is vital that you continue to keep your blood pressure, blood glucose and blood cholesterol in your target range. It is advisable to choose foods that are healthy for your hear and cut back on salt. If you are a smoker, you should take steps to quit as smoking damages the kidney. Taking the medicines provided is helpful. 

How long does it take to receive my results?

Results will be issued within 24 hours of the sample reaching the lab. 

What is a CKD? 

The term chronic kidney disease (CKD) is used worldwide to mean any form of kidney disease that goes on for more than a few months. CKD means the kidneys are damaged and may no longer filter blood well. This damage happens over many years as you often do not experience any symptoms of CKD until your kidneys are about to fail. As more damage occurs, the kidneys are unable to keep the body healthy, in this case dialysis or a kidney transplant may be needed to maintain health.

The word ‘chronic’ doesn’t necessarily mean ‘serious’ and the word ‘disease’ includes any abnormality of kidney structure or function, whether or not it is likely to cause a person to feel unwell or to develop complications. 

There are various stages of CKD, ranging from mild loss of kidney function to complete kidney failure, but not all CKD conditions progress to the most serious stage. Most people fall into the mild to moderate categories where hospital-based care is not necessary. 

If you have CKD your doctor should regularly test your urine and blood to find out if there is any kidney damage, how serious the condition is, whether it is getting worse and what treatments you might need to manage your symptoms.

Why does my doctor want to know what medicines I am taking?

If you regularly take over-the-counter (OTC) pain medication, you may be causing kidney damage. Nonsteroidal anti-inflammatory drugs (NSAIDs), including ibuprofen and naproxen, can damage your kidneys if you take them regularly for chronic pain, headaches, or arthritis.

People with no kidney issues who take the medicine occasionally are likely in the clear. However, if you use these medicines daily, you could be risking your kidneys’ health. You should consult the doctor about kidney-safe treatments if you’re coping with pain. 



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