A 45-year-old female asked:

What is wrong when your urine comes out black?

1 doctor answer • 1 doctor weighed in

Dr. Christian Assadanswered

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

3.4k viewsAnswered >2 years ago

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