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A 40-year-old member asked:

What does an elevated bun/creatinine ratio mean?

1 doctor answer4 doctors weighed in
Dr. Peter Kurzweil
Internal Medicine 51 years experience
Decrease in flow.: Bun=blood urea nitrogen, byproduct of proteins ingested, if rise to high levels due to kidney problem, can cause toxic affects on the body. Creatinine= measurement of renal function. Normal bun/cr ratio about 10. The higher that ratio, the more likely it is not intrinsic kidney disease per se, but reduction in blood flow or volume to kidney, like when on strong diuretic-prerenal-reversible.
Dr. Ed Friedlander
Pathology 45 years experience
Dr. Kurzwell is correct. And just eating some extra protein, like a nice steak dinner, will raise your BUN/creatinine ratio. This is one more reason not to get all worked up over your labs -- they're there if you're sick, but most minor variations are of no importance if you feel well.
May 15, 2014

Similar questions

A 42-year-old member asked:

What causes elevated bun/creatinine ratio?

3 doctor answers5 doctors weighed in
Dr. Peter Kurzweil
Internal Medicine 51 years experience
Decrease in flow.: Bun=blood urea nitrogen, byproduct of proteins ingested, if rise to high levels due to kidney problem, can cause toxic affects on the body. Creatinine= measurement of renal function. Normal bun/cr ratio about 10. The higher that ratio, the more likely it is not intrinsic kidney disease per se, but reduction in blood flow or volume to kidney, like when on strong diuretic-prerenal-reversible.
A 43-year-old member asked:

What does bun/creatinine ratio of 29 mean?

1 doctor answer1 doctor weighed in
Dr. James Cain
Nephrology and Dialysis 37 years experience
depends: The 'normal' ratio is 10:1, this will increase if you become volume depleted. Steroids, high protein diet , gastrointestinal bleeding and renal failure can raise the ratio.
A 30-year-old member asked:

Bun/creatinine ratio 23 what does this mean?

1 doctor answer2 doctors weighed in
Dr. Jack Rubin
Nephrology and Dialysis 49 years experience
BUN-creatinine ratio: The BUN (b)-creatinine (c) ratio is the association with b and c. If your b/c was 20, you would have a b of 20 and a c of 1 in your blood. In your case, you could have had a b of 23 and a c of 1.
A 35-year-old member asked:

Low creatinine and elevated bun/creatinine ratio. Interpret?

1 doctor answer2 doctors weighed in
Dr. Robert Dow
Family Medicine 23 years experience
Dehydration: Low creatinine is good. Elevated ratio usually indicates dehydration.
A 38-year-old member asked:

Meaning of bun/creatinine ratio?

1 doctor answer3 doctors weighed in
Dr. Peter Kurzweil
Internal Medicine 51 years experience
Defines kidney prob: Bun=blood urea nitrogen, byproduct of proteins ingested, if rise to high levels due to kidney problem, can cause toxic affects on the body. Creatinine= measurement of renal function. Normal bun/cr ratio about 10. The higher that ratio, the more likely it is not intrinsic kidney disease per se, but reduction in blood flow or volume to kidney, like when on strong diuretic-prerenal-reversible.

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Last updated Jul 15, 2020

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