What is the normal range for blood urea nitrogen (BUN) in mg/dL?

The normal range for blood urea nitrogen (BUN) is recognized as 7 to 20 mg/dL. BUN is a waste product formed in the liver from the breakdown of protein and is a key indicator used in assessing kidney function. The kidneys filter urea from the blood, and its levels can reflect how well the kidneys are functioning. Variations outside this range can indicate issues such as dehydration, kidney dysfunction, or increased protein intake, making it essential for healthcare professionals to interpret BUN levels accurately to evaluate patient health. Understanding this range helps nurses monitor patients appropriately and inform treatment plans when abnormalities are detected.