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What do results from a blood urea nitrogen (BUN) test mean?

ANSWER

Your result will be a number that measures how much BUN is in your blood. The range considered normal is between 7 to 20 milligrams per deciliter. (A milligram is a very tiny amount -- more than 28,000 to an ounce, and a deciliter is equal to about 3.4 ounces).

If your test results are not in that range, talk to your doctor.

SOURCES:

American Association for Clinical Chemistry: "Blood Urea Nitrogen."

University of Rochester Medical Center: "Blood Urea Nitrogen."

National Kidney Foundation: "Tests to Measure Kidney Function."

Mayo Clinic: "Blood Urea Nitrogen Test," "Heart Failure."

Scripps Health Foundation: "BUN -- Blood Test."

U.S. National Library of Medicine: "Gastrointestinal Bleeding."

American Association for Clinical Chemistry: "Creatinine."

National Health Service (U.K.): "Malnutrition."

Reviewed by Nayana Ambardekar on March 09, 2019

SOURCES:

American Association for Clinical Chemistry: "Blood Urea Nitrogen."

University of Rochester Medical Center: "Blood Urea Nitrogen."

National Kidney Foundation: "Tests to Measure Kidney Function."

Mayo Clinic: "Blood Urea Nitrogen Test," "Heart Failure."

Scripps Health Foundation: "BUN -- Blood Test."

U.S. National Library of Medicine: "Gastrointestinal Bleeding."

American Association for Clinical Chemistry: "Creatinine."

National Health Service (U.K.): "Malnutrition."

Reviewed by Nayana Ambardekar on March 09, 2019

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What can affect blood urea nitrogen (BUN) test results?

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