Kidney function tests: Everything you need to know

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Kidney function tests are simple procedures that use either the blood or urine to help identify issues in the kidneys. There are a few different types of kidney function tests that investigate various aspects of kidney function.

A kidney function test may check to see if the kidneys are filtering waste products too slowly. Another type of test may see if the kidneys are leaking proteins into the urine.

A doctor who thinks a person may have a problem with their kidneys may order a kidney function test, but regular testing can be helpful for all adults.

As the National Kidney Foundation note, 1 in 3 adults in the United States is at risk for kidney disease, and many people with early forms of the disease have no symptoms. It is important to diagnose and treat the condition early before it can do any permanent damage.

In this article, learn about a variety of kidney function tests and their results.


Kidney function tests target either the blood or urine and measure different aspects of kidney function.

Often, doctors will order more than one test at a time to get a broader picture of the overall kidney function.

The kidneys play an essential role in keeping the body healthy. Their main job is to filter waste materials from the blood and send them out of the body in the urine.

Kidney damage can prevent the kidneys from filtering the waste properly, leaving it to remain in the body and cause dangerous symptoms.

Regular testing may help identify issues such as kidney disease in very early stages, making it possible to halt the progress of the disease.

Doctors may also order other tests to get more information about the kidney, such as imaging tests or a … Read More...