Kidney Function
Blood Urea Nitrogen (BUN)
Urea nitrogen is a waste product made in the liver when protein is broken down, then filtered by kidneys.
🩺
Medically Reviewed by ILoveHealthcare Advisory Board
Information verified for medical accuracy
Why is it tested?
To evaluate kidney function, or help diagnose liver problems or dehydration.
What does a HIGH level mean?
- Kidney disease
- Heart failure
- Dehydration
- High protein diet or GI bleeding
What does a LOW level mean?
- Liver failure
- Malnutrition
- Overhydration
Normal Reference Range
7 to 20 mg/dL
*Ranges may vary slightly depending on the specific laboratory and testing methods used.
Related Biomarkers
Stop Guessing
Is your Blood Urea Nitrogen (BUN) level dangerous? Let AI explain it instantly.
Medical reports are confusing. Take a photo of your lab test, and ILoveHealthcare will analyze all your biomarkers together, giving you a personalized, easy-to-understand summary.