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A 45-year-old female asked:

What is wrong when your urine comes out black?

1 doctor answer1 doctor weighed in
Dr. Christian Assad
Cardiology 15 years experience
Dark urine: Brown or black urine (not due to myoglobin or bilirubin) may be caused by excessive L-dopa or melanin excretion as well as copper or phenol poisoning. Ingestion of large amounts of rhubarb, fava beans, or aloe can cause dark brownish black urine. More info at http://urology.stanford.edu/about/articles/abnormal_urine.html

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Last updated Dec 30, 2014

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