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Measure your kidney function with creatinine including eGFR and CKD-EPI calculation.
How would you like to take the test?
The analyses are the same. Choose between collecting your sample at home or having blood drawn at a collection point.
Blood collection at collection point
After your order you receive instructions by email
Make an appointment at a collection point near you
Blood collection at 1,000+ locations across the Netherlands
Creatinine is a waste product that results from the normal breakdown of muscle tissue. It is transported through the bloodstream to the kidneys, where it is filtered and excreted through urine. Creatinine is an important biomarker for kidney function.
The eGFR (estimated Glomerular Filtration Rate) is a calculation that provides an estimate of how well your kidneys are functioning. It is calculated using the CKD-EPI formula (Chronic Kidney Disease Epidemiology Collaboration), the most accurate and current formula for estimating kidney function.
The CKD-EPI formula uses:
The eGFR indicates how much blood (in milliliters) your kidneys can filter per minute per 1.73m² body surface area. This provides a much more accurate picture of kidney function than creatinine alone.
Testing creatinine and calculating eGFR is essential for assessing kidney function. This combination provides the most complete picture of how well your kidneys are working. The test is used for:
The eGFR is the primary indicator of kidney function and is classified into different stages:
Elevated creatinine and low eGFR indicate decreased kidney function. The kidneys are less able to effectively filter waste products from the blood. Possible causes include:
Low creatinine is less common and may indicate:
A very high eGFR (>120 mL/min/1.73m²) is often normal in young, healthy people. It can also occur with hyperfiltration in early-stage diabetes, where the kidneys temporarily work harder.
For the most reliable results, it is recommended to:
Always discuss an abnormal result with your GP. If a result is strongly abnormal, we try to reach you as soon as possible. Read your result yourself as well and contact your GP if in doubt. A test does not make a diagnosis. Read more about risks and results
Independent information sources
We recommend consulting these independent sources before ordering a preventive health check.
Practical information
After ordering we generate a referral letter and email you the instructions. You pick a collection point yourself and book an appointment there. Blood is drawn at the location, processed at the lab, and your result arrives digitally.
Often within a few working days. How soon you can be seen depends on how busy the location is and the type of analysis. For specialist analyses we first ship collection materials, which takes a bit longer.
At most collection points yes. Some accept walk-ins. This is clearly indicated per location. You choose the location that works best for you.
That depends on the test. Whether fasting is required, and from what time, is clearly stated in the instructions you receive after ordering. No surprises at the counter.
Usually within a few working days after collection. Turnaround time varies by analysis; analyses sent to an external lab can take longer. You receive your laboratory report securely by email. It lists the measured values, units, reference ranges and any flags added by the laboratory.
We work with 1,000+ collection points across the Netherlands. After ordering you'll see which locations near you are available and you pick where you'd like to go.
Not sure which test is right for you? We’re happy to help.
Weekdays 09:00 – 17:00
“Very positive experience”
From ordering to having my blood drawn, everything went smoothly and was well organised. I really appreciated being able to visit a blood collection location in my own town so quickly. I received clear instructions beforehand, and the results arrived promptly by email too. Very satisfied!
“Good communication”
This company responds to questions thoroughly and promptly. The entire process, from requesting the test to having blood drawn and receiving the results, runs very smoothly. Overall, I am very satisfied!
“Wide choice of tests, fast and affordable”
You can choose the tests yourself. Fast delivery and processing, clear instructions and affordable.
“I am satisfied with the service”
I received a referral by email, just like from a GP. I did not have to send anything by post and could quickly visit a local blood collection centre. The results were fast and clear. The price was good, not too expensive, and all messages were secure.
“A very good experience”
A very good experience! I received quick answers to my questions, a custom blood test was put together, everything was arranged smoothly, and I could have my blood drawn by a healthcare professional nearby. The results were available within a few days. In short, very satisfied!
“Very good customer service”
The customer service is very good. I had a complex request, which caused an issue at the blood collection centre. Customer service resolved it very well. They also offer a wide range of tests at a reasonable price.
“Everything was well organised”
Everything was well organised. The products were delivered within a few days and, after sending in the samples, the results arrived within a few days too. Communication and information throughout the process were clear and friendly.
“Fantastic service”
Fantastic service! Very good customer service that responds quickly and thinks along with you. Good prices. I will definitely use BloedCheckup's services again.
“Very happy to have found this business”
Very happy to have found this business. We need to check our blood more often :) The process was easy. They sent me the kit at home, then I had to go to a clinic with the papers and they knew what they had to do. I got the results in less than a week.
“Smooth process and good support”
Amazing website experience. I ordered various tests for 2 people. We went to one of the supported centers and took samples. Also after the results were ready, I needed a letter from the laboratory and they prepared the letter for me in no time. Definitely recommended.
“Amazing service!”
Received a packet with everything needed, went to a walk in clinic (Amsterdam DC Clinic) where my blood was drawn and I was out the door within 5 minutes, and then after posting the samples, received results 2 days later. Results were easy to understand as well. Amazing service, would highly recommend!
“Great customer service”
I ordered a test through bloedcheckup.nl but later realized I no longer needed it. I contacted their support team, and they were very quick, responsive, and helpful in handling my cancellation. The whole process was smooth and efficient. Great customer service!