A 23-year-old male asked:
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dark urine which gets lighter for a short while after drinking water but then gets darker again. liver chemistry tests came back normal?

1 doctor answer
Dr. Stuart Winkler
47 years experience Nephrology and Dialysis
Dark urine: The kidneys are important for retaining the water you drink and preventing dehydration. When you do not drink much the kidneys reabsorb as much water as they can resulting in dark concentrated urine. When you drink water the excess water is removed and the urine becomes lighter. Other causes of dark urine can be liver disease, blood, hemoglobin or myoglobin. You can use a urinary dip stick.
Answered on Apr 4, 2020

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