What does BUN represent in blood tests?

BUN stands for Blood Urea Nitrogen, which is a key measurement in blood tests that assesses kidney function. Urea is a waste product formed in the liver when protein is broken down. It then enters the bloodstream and is typically filtered out by the kidneys, so measuring the levels of urea nitrogen in the blood provides important information about how well the kidneys are working.

High levels of BUN can indicate that the kidneys are not functioning effectively or that there are issues affecting kidney health, such as dehydration or significant kidney disease. Conversely, low levels may suggest overhydration or malnutrition.

Understanding the role of BUN in diagnosing kidney function is crucial for healthcare providers in evaluating patients' health and directing further testing or treatment if necessary. The other options provided do not accurately describe what BUN represents in this context.