What is a BUN Test?
A blood urea nitrogen (BUN) test is a standard medical diagnostic test that measures urea nitrogen concentration in the blood. Urea is a waste product formed in the liver due to protein metabolism. It is then filtered out of the blood by the kidneys and excreted from the body through urine. The BUN Test is valuable for assessing kidney function and overall health (American Kidney Fund, 2024; National Kidney Foundation, 2018).
The BUN Test involves drawing a blood sample, typically from a vein in the arm. This sample is then sent to a laboratory for analysis. The test results are usually reported in milligrams per deciliter (mg/dL) of blood. The test helps healthcare providers in diagnosing and monitoring various medical conditions, particularly those related to kidney health and liver function. It is often used in conjunction with other kidney function tests and clinical information to provide a comprehensive assessment of a patient's health.










