What is a normal eGFR?

Healthy kidneys usually have an eGFR above 90. Results between 60 and 90 can still be normal if there are no other signs of kidney disease, which is why eGFR is interpreted alongside other tests.

Do I need to fast for a kidney blood test?

No. You can eat and drink normally, but avoid meat for 12 hours beforehand, as it can affect your creatinine result.

Does this test include a urine test?

No, this is a blood test. A urine albumin:creatinine ratio (ACR) is often used alongside eGFR to check for kidney damage, so your GP may suggest one if your results need follow-up.

Kidney Health Blood Test at Jace Medical

Organ function

Private blood test

Kidney Health Blood Test

Standard kidney function tests, used to check how well your kidneys are working.

10 biomarkers
No fasting needed

£49Includes sample collection

Book this test Ask a question

We confirm your appointment and any preparation, such as fasting, before you attend.

What’s included

10 biomarkers in this test.

No fasting needed

Liver1

Enzymes and proteins that show how well your liver is working.

Albumin

Kidneys3

How well your kidneys filter waste from your blood.

Creatinine
Estimated Glomerular Filtration Rate (eGFR)
Urea

Body salts & minerals6

Electrolytes and minerals that help your nerves, muscles and heart work properly.

Calcium (adjusted)
Chloride
Magnesium
Phosphate
Potassium
Sodium

About this test

Is the Kidney Health Blood Test right for you?

Who it’s for

You have a condition that can affect the kidneys, such as high blood pressure, diabetes or heart disease, and want your kidney function checked.
You take a long-term medicine that can affect the kidneys, such as lithium, omeprazole or an anti-inflammatory painkiller like ibuprofen.
Kidney disease runs in your family, or you have had kidney stones or an enlarged prostate.
You want to recheck a previous borderline kidney result.

What it can show

Creatinine is a waste product from your muscles that healthy kidneys filter out. Your creatinine result, age and sex are used to calculate your eGFR (estimated glomerular filtration rate), the main measure of how well your kidneys are filtering.
Urea is another waste product cleared by the kidneys. It can help show whether you are short of fluid, but creatinine and eGFR are the better guide to kidney function.
Sodium, potassium, chloride, calcium, phosphate and magnesium are minerals that your kidneys help keep in balance. Their levels can change when the kidneys are not working well.
Albumin is the main protein in your blood. It is used to work out your adjusted calcium, because some calcium in the blood is carried by albumin.

What it can’t tell you

This is a blood test only. It does not include the urine albumin:creatinine ratio (ACR), which is usually checked alongside eGFR to give a fuller picture of kidney health.
One result is a snapshot. NICE advises that a first eGFR below 60 is repeated within 2 weeks, and chronic kidney disease is only diagnosed when changes last for more than 3 months.
eGFR is less reliable if you have a lot of muscle or very little, take protein supplements, are pregnant or have had an amputation. eGFR results above 60 are also less precise.
A normal result does not rule out every kidney problem. Results need to be interpreted alongside your symptoms and history, and diagnosis and treatment of kidney disease are with your GP or specialist.

How it works

From booking to results in three steps.

Step 1
Request your test
Send a booking request online or call us. We confirm your clinic, appointment time and any preparation.
Step 2
Visit the clinic
A short appointment for professional sample collection at Greysteel or Letterkenny. No GP referral needed.
Step 3
Receive your results
Usually within a couple of working days, emailed to you once a doctor has reviewed them.

Common questions

Questions about this test.

Yes. You can book this test directly, without a referral. A doctor reviews your results, and any ongoing care for a kidney problem is with your GP or specialist.