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does fasting affect bun levels

A 58-year-old female asked:
Dr. Michael Dugan
Specializes in Hematology
Nope: The ratio is high due to a relative increase in the BUN with a perfectly normal cr. You may have been a bit dehydrated with the fast. No issue here.
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A 57-year-old female asked:
Dr. Yun Tran
Dr. Yun Tran answered
16 years experience Family Medicine
Need more info: If it‘s solated low GFR, and you‘re otherwise healthy (with normal urine studies and maybe ultrasound) all that needs to be done is continued monitori ... Read More
A 31-year-old member asked:
Dr. Jack Rubin
48 years experience Nephrology and Dialysis
BUN and creatinine: If you have high BUN and creatinine levels, you may be dehydrated or you may have chronic kidney disease. Ask the physician who ordered the blood test ... Read More
A 34-year-old male asked:
Dr. Jalal Zuberi
45 years experience Pediatrics
BUN Cr. Ratio: is useful in the differential diagnosis of acute or chronic renal disease. Reduced renal perfusion, e.g., congestive heart failure, or recent onset of ... Read More
A 37-year-old female asked:
Dr. Donald Colantino
61 years experience Internal Medicine
Ratio: If the BUN is elevated out of proportion to the creatinine, it could signify dehydration or bleeding into the intestinal tract. Your ratio appears to ... Read More
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A 2-year-old female asked:
Dr. Yong Wen
Dr. Yong Wen answered
21 years experience Internal Medicine
Bun and creatinine: Do not worry about ratio of bun/cr. Bun is affected by many factors, hydration status, protein intake, muscle mass, whether on any hormone supplement. ... Read More
A member asked:
Dr. Gurmukh Singh
49 years experience Pathology
Dehydration?: Your creatinine is normal, the slight elevation in BUN may be due to dehydration associated with fasting. Ask you doctor for an estimated glomerular f ... Read More
A 34-year-old member asked:
Dr. Jeffrey Gene Kaplan
52 years experience Pediatrics
Kidney or load: The BUN is a measure of the amount of nitrogen in the blood in the form of urea, and it is, thereby a measurement of renal function. Thus, if one imp ... Read More
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A 35-year-old member asked:
Dr. Ronald Krauser
52 years experience Rheumatology
Not possible.: A level that high is virtually impossible.
A 56-year-old female asked:
Dr. Ronald Krauser
52 years experience Rheumatology
See details: Elevated levels of BUN and creatinine signify reduced kidney function. The higher the values, the more compromised the kidney function.
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