A member asked:

My bun was 20 today. can dehydration cause it to be higher? mine has always been on low end. creatinine is normal, no other symptoms or abnormal tests. i have barely been drinking a bottle of water per day for quite a while?

3 doctors weighed in across 2 answers
Dr. Hiep Le answered

Specializes in Nephrology and Dialysis

Yes, there are several things which cause high BUN without affecting much serum creatinine: mild dehydration, eating high protein and taking steroids. Moderate to severe dehydration can increase serum creatinine too along with a much higher BUN, usually the ratio BUN/creat will be above 20 with dehydration. Yes, your intake of only one bottle of water (500 cc) a day is low.

Answered 5/21/2021

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Dehydration is the leading cause of elevated BUN with normal creatinine. Drink enough water daily so that your urine is mostly colorless and may repeat the test in 3-6 months. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, have safe sex, no tobacco alcohol weed or street drugs.

Answered 5/21/2021

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