Hello
Dark colored urine can be a sign of blood in the urine. Since it smells like iron, this would be my guess. It can also indicate liver problems. If his stools are also light in color and the urine dark, that's a symptom of liver failure.
I would strongly encourage him to find out what the source of the bleeding is, if that is the case. Either way it needs to be investigated. It could be his prostate.
Kerry
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Kerry, RN
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