BUN Test

The blood urea nitrogen (BUN) test is a blood test that measures the level of urea nitrogen in the blood. Urea is a waste product produced by the liver as it breaks down proteins, and it is normally excreted by the kidneys in the urine. The BUN test is often used as a screening tool to assess kidney function, as an elevated BUN level can indicate decreased kidney function. Other conditions that can cause elevated BUN levels include dehydration, heart failure, liver disease, and high protein intake. A BUN test is usually ordered along with a creatinine test to get a more complete picture of kidney function. Treatment for high BUN levels depends on the underlying cause and may involve addressing any kidney or liver problems, rehydration, or dietary changes.


This page is provided for educational and informational purposes only and does not constitute the provision of medical advice or professional services. The information provided should not be used for diagnosing or treating a health problem or disease, and those seeking personal medical advice regarding any of the tests and conditions referenced above are advised to consult with a licensed clinician. Always seek the advice of your qualified health provider regarding a medical condition and do not disregard professional medical advice or delay in seeking it because of any information on this page. If you think you may have a medical emergency, immediately call 911 or go to the nearest urgent care center or hospital.


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