What is the normal range for Blood Urea Nitrogen (BUN)?

The normal range for Blood Urea Nitrogen (BUN) is commonly accepted to be from 7 to 20 mg/dl, and it can vary slightly depending on the laboratory and the reference range they use. The choice stating 8-30 mg/dl encompasses a portion of the normal range but extends it toward the higher end, which is generally above the typical reference values. This can include instances of dehydration or kidney dysfunction that may lead to higher BUN levels.

The correct range should reflect the physiological levels that are associated with proper kidney function and protein metabolism in a healthy individual. The ranges provided in the other options narrow down the expected values, with 10-20 mg/dl closely aligning with established medical guidelines. However, the most standard normal range is likely the one more closely aligned to 7-20 mg/dl. Thus, it’s important to recognize that while option B is broader, the most appropriate regular range is often cited as around 10-20 mg/dl in clinical practice. Ultimately, understanding these numeric ranges is crucial in interpreting renal function and metabolic status.