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

The normal range for blood urea nitrogen (BUN) levels is 10-20 mg/dL. BUN is a measure of the amount of nitrogen in your blood that comes from the waste product urea, which is produced from protein metabolism in the liver. Urea is filtered out of the blood by the kidneys, so BUN levels can reflect kidney function as well as dietary protein intake and hydration status.

Values within the range of 10-20 mg/dL are considered indicative of normal kidney function and protein metabolism. If BUN levels fall below this range or rise significantly above it, it can indicate underlying issues such as low protein intake, liver dysfunction, or renal impairment, but the specific context and other laboratory results must be considered for accurate interpretation of an individual’s health status.