Doctor insights on:
How To Lower Bun Level
Depends: Bun, or blood urea nitrogen, is the byproduct of normal protein breakdown and conversion to urea by the liver. BUN is excreted by the kidney. So BUN can be up or down depending on the synthesis by the liver or excretion by the kidney. In sudden liver failure, e.g. Acute liver failure, BUN is low, since urea synthesis by the liver is reduced, but if the kidneys do not work, BUN will go up. ...Read more
My BUN level on lower end most of my life, hovers between .48-.60. Doc said normal since other kidney tests ok. Are some people just low?
Bun: The bun can be quite variable low ones may be due to overhydation if you drink too much fluid but rally nothing to worry about only high bun are worrisome ...Read more
Okay: This is a bit low in standard US units but I wouldn't worry. Reference range is set arbitrarily so that several percent of healthy folks fall outside. Unless you're a kid being worked up for a rare inborn error of metabolism, or you're obviously in the final stages of liver failure, low BUN means nothing. ...Read moreSee 1 more doctor answer
Need correct value: and units. All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, it would have helped to know the correct result. 23h is not the conventional reporting of BUN results. If it is 23 mg/dL, it is slightly above normal and you should discuss it with your doctor. ...Read more
Blood urea nitrogen : Or bun, is an indicator of kidney function, fluid balance, muscle turnover (breakdown and rebuilding). Normal BUN is between 7 and 20. A low BUN could be seen in a person with lower muscle mass or low muscle use (ex a paraplegic person) where there is less muscle turnover than in more active people. This could also suggest malnutrition. A low BUN could also be seen in liver failure, pregnancy. ...Read more
BUN of 5: Your BUN of 5 mg/dl is just below normal. It is important to know that its level varies from lab to lab. Your BUN is a function of your protein intake and your state of hydration. If you need any more information in your case, perhaps discussing your question with the physician who ordered the test would be helpful. ...Read more
My BUN level was 8 yesterday and 14 today. Is that significant or problematic? Seems like a big change.
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