What color is urine when your kidneys are failing?

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Dr Kareemulla Shaik

General Practitioner

MBBS
0+ Yrs

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When kidneys are failing, the increased concentration and accumulation of substances in urine lead to a darker color which may be brown, red or purple

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Answered 04/07/2025

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I'm trying to understand my recent kidney test results. My creatinine is at 0.8 mgdL and my urea level is 21 mgdL. Could you help me figure out what my BUN-to-creatinine ratio is and what it means for my health? I'm kind of worried about the effects it might have.

Your BUNCreatinine ratio can be calculated by dividing the BUN value by the creatinine value. In your case, the BUNCreatinine ratio is 210.8, which equals 26.25. A normal BUNCreatinine ratio is typically between 10:1 and 20:1. A ratio higher than this range may indicate dehydration, gastrointestinal bleeding, or a diet high in protein. A ratio lower than this range may indicate liver disease or malnutrition. In your case, with a BUNCreatinine ratio of 26.25, it is slightly higher than the normal range. This could be due to dehydration or a high-protein diet. It is important to stay hydrated and consider adjusting your diet if necessary.

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