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Doctor insights on: What Are Normal Blood Urea Nitrogen Levels

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Dr. Linda Callaghan
28 doctors shared insights

Urea Nitrogen (Definition)

Urea nitrogen abbreviated BUN is a chemical in the blood that results from the body's use of proteins and is a waste product. Urea nitrogen is processed in the liver and the kidneys and eliminated from ...Read more


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What does it indicate if you have a high level of blood urea nitrogen?

What does it indicate if you have a high level of blood urea nitrogen?

Kidney issue: In general, a high BUN is indicative of an issue with kidney function or overall dehydration. All blood tests need to be interpreted in context. ...Read more

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What is the most likely reason for having an abnormally high blood urea nitrogen level?

See below: High urea level can reflect dehydration , other causes include high protein intake, and decreased kidney function. ...Read more

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Is it possible to have high creatinine, high blood urea nitrogen and high potassium levels simultaneously?

Is it possible to have high creatinine, high blood urea nitrogen and high potassium levels simultaneously?

Absolutely yes: This is exactly what is seen with kidney (renal) failure. I am not making a diagnosis on this information alone. I can only advise strongly that anyone with elevation in bun, cr and potassium, as listed above, should see his/her physician immediately. ...Read more

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Recently blood urea nitrogen and serum creatinine levels what can I do..?

Recently blood urea nitrogen and serum creatinine levels what can I do..?

kidney dysfunction: Creatinine is a byproduct of muscle metabolism and is excreted by the kidneys. High serum creatinine generally indicate kidney damage.High levels can be seen in muscle damage, people who consume creatine supplements. BUN is also a byproduct of protein metabolism which is excreted by the kidneys.If serum BUN and creatinine are elevated, it suggests that there may be kidney dysfunction. ...Read more

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I had a cmp done at doctors . Everything was normal except anion gap At 3. My blood urea nitrogen at 21 . ( doc said cuz I fasted).. Why is this low?

I had a cmp done at doctors . Everything was normal except  anion gap At 3. My blood urea nitrogen at 21 . ( doc said cuz I fasted).. Why is this low?

First things 1st.: Why did you have the test? No test should be interpreted in a vacuum. Most of the time the abnormality described is pretty meaningless. But attempting to answer your question requires we know about your medical history. ...Read more

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What's blood urea nitrogen?

What's blood urea nitrogen?

Liver chemical: This is a measurement of a concentration of urea in the blood stream and is related to the health of the liver. If the liver is dysfunctional, the level - termed BUN - will rise. This is part of most blood screening tests. ...Read more

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What is the definition or description of: blood urea nitrogen?

What is the definition or description of: blood urea nitrogen?

Metabolic waste : It's level helps evaluate renal function elevation can mean poor renal function or GI bleeding. ...Read more

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Can you explain what 12.86mg/dl bun (blood urea nitrogen) and 1.34 mg/dl creatinine mean?

Can you explain what 12.86mg/dl bun (blood urea nitrogen) and 1.34 mg/dl creatinine mean?

Normal: Seems normal- however could be slightly abnormal if this is a 90 yr old emaciated female or a very small child. ...Read more

Dr. Alok Agrawal
255 doctors shared insights

Blood Urea Nitrogen (Definition)

It's level helps evaluate renal function elevation can mean poor renal ...Read more