what does bun mean in a blood test

In a blood test, BUN stands for Blood Urea Nitrogen. It measures the amount of urea nitrogen in the blood, providing important information about kidney function. Urea nitrogen is a waste product that the kidneys remove from the blood. The test is typically part of a routine check-up or may be ordered if there are concerns about kidney function. Normal BUN levels are generally around 6 to 24 mg/dL, but they can vary. Abnormal levels may indicate health conditions, including kidney disease or damage. The BUN test is done by taking a blood sample from a vein in the arm, and it usually does not require special preparation