BUN/Creatinine Ratio
The BUN/creatinine ratio compares the two main kidney waste markers. It helps work out why one of them is abnormal, rather than measuring kidney function directly.
Your reading
This app uses 10–20. A high ratio most often means dehydration, a very high protein intake, or bleeding in the upper gut. A low ratio can come with a low-protein diet or liver issues. If both BUN and creatinine are normal, the ratio rarely matters.
What may help
- —Hydrating well and retesting if the ratio is high
- —Thinking about your protein intake in the days before the test
When to talk to a doctor
If the ratio is abnormal together with an abnormal BUN or creatinine.
Common questions
What is BUN/Creatinine Ratio?
The BUN/creatinine ratio compares the two main kidney waste markers. It helps work out why one of them is abnormal, rather than measuring kidney function directly.
What is a normal BUN/Creatinine Ratio level?
Daygo uses 10–20 as the reference range. This app uses 10–20. A high ratio most often means dehydration, a very high protein intake, or bleeding in the upper gut. A low ratio can come with a low-protein diet or liver issues. If both BUN and creatinine are normal, the ratio rarely matters.
How can I improve my BUN/Creatinine Ratio?
Hydrating well and retesting if the ratio is high. Thinking about your protein intake in the days before the test.
When should I see a doctor about BUN/Creatinine Ratio?
If the ratio is abnormal together with an abnormal BUN or creatinine.
Source: MedlinePlus (NIH): Basic Metabolic Panel. Reference ranges are standard adult intervals — your own lab may report a different range for your age, sex, or method. This isn't medical advice; always go by the range on your actual results and talk to a clinician about anything that concerns you.