Urea and electrolytes (blood)

This is an important test that is typically used to monitor kidney function and diagnose kidney damage.

Finger-prick blood
4 tests included
2 days turnaround



About Urea and electrolytes (blood)

What are urea and electrolytes?

Urea is a metabolic waste product excreted in the urine by the kidneys. Urea is used to transport nitrogen waste from proteins, which is produced as ammonia in the liver and combined with other elements such as oxygen, hydrogen and carbon to produce urea. Urea is transported through the blood to the kidneys, where it is excreted and used along with electrolytes such as sodium to control the amount of water lost in the urine. Abnormal blood urea and electrolyte levels are a common method of assessing overall kidney function.

Why take the test?

This test measures the concentration of urea, sodium and creatinine in the blood. It is typically used to monitor kidney function and diagnose kidney damage.


What's tested

Kidney Function

How it works



Purchase your Kit

Just order a test online and get your kit delivered right to your door unless you are ordering a COVID-19 Fit to Fly test where you will be given appointment options to attend our clinics across the United Kingdom for a nose and throat swab PCR test at the checkout stage.



Take your test and post

Follow our simple instructions to take your sample and post back the enclosed prepaid envelope to our accredited lab for processing. We also offer home or workplace visits by a qualified nurse. For COVID-19 Fit to Fly tests you must attend one of our partner clinics for our trained collection officers to take your sample. You will then have the results emailed to you.



Get results directly to your dashboard

You will receive an email notification from our medical team when your results are available on your secure personalised health dashboard.