What is the reference range for BUN levels in mg/dL?

The correct reference range for Blood Urea Nitrogen (BUN) levels in milligrams per deciliter (mg/dL) is 6-20 mg/dL. This range is established based on the normal functioning of the kidneys and the body's metabolism of proteins. BUN is a waste product formed from the breakdown of proteins and is filtered out of the blood by the kidneys. Monitoring BUN levels is crucial in evaluating kidney function, nutritional status, and hydration levels.

Within this reference range, values significantly lower or higher may indicate different physiological conditions. For instance, decreased levels might suggest malnutrition or severe liver disease, while elevated levels could signify kidney disease, dehydration, or excessive protein intake. Therefore, understanding the normal range is vital for assessing a patient's health and guiding treatment decisions.