What is Blood Urea Nitrogen (BUN)?
Blood Urea Nitrogen is measured as part of a kidney function panel. Your BUN is normal — kidney waste filtration is working well.
What does a high Blood Urea Nitrogen mean?
Elevated BUN can indicate dehydration, high protein intake, kidney disease, or internal bleeding. Usually interpreted alongside creatinine.
If markedly elevated: Critically high BUN indicates severe kidney dysfunction. Urgent evaluation is needed.
What does a low Blood Urea Nitrogen mean?
Low BUN is rarely clinically significant — sometimes seen with liver disease or low-protein diet.
Understand your whole report, not just one number
A single value rarely tells the full story — Blood Urea Nitrogen is best read alongside the rest of your panel. Paste your values or upload your report and get a plain-English explanation of every marker, with the important results flagged.