What is the normal BUN level range?

The normal blood urea nitrogen (BUN) level range is considered to be around 7-25 mg/dL. This range reflects the concentration of urea nitrogen in the blood, which is a waste product formed from the metabolism of proteins. The kidneys filter urea out of the blood, and measuring BUN levels can help assess kidney function and hydration status.

The reason this range is accepted as normal is based on standard clinical practices and lab reference ranges, which may vary slightly between laboratories. However, the 7-25 mg/dL range is widely acknowledged in clinical settings, providing essential insights into kidney health and patient hydration.

Values below or above this range could indicate various health conditions. For instance, a significantly lower BUN level may suggest liver disease or malnutrition, while higher levels can signal dehydration or impaired kidney function. Understanding this reference range is critical for interpreting BUN results in the context of a patient's overall health.