The causes of dark or brown urine are many, ranging from benign to possibly fatal.
Have you eaten recently any of the following? Fava beans, rhubarb pie, black licorice, blackberries or dyed foods? These foods can darken urine. The darkness in your urine, if caused by these foods, will take a few days to return to normal once you cease eating these items.
Laxatives that contain cascara or senna
-Bleeding in the kidney, ureter or bladder
-Melanoma (urine color can be dark brown or even blackish)
-Acute glomerulonephritis, a kidney ailment that impedes a kidney’s ability to remove excess waste and fluids
-Liver disease, particularly cirrhosis and hepatitis
-Hemolytic anemia (abnormal breakdown of red blood cells)
-Tyrosinemia, a rare genetic disorder: elevated blood levels of tyrosine, which is an amino acid
-Rhabdomyolysis, a side effect from statin medications that causes muscle pain. Urine may be reddish brown or golden brown, a hallmark sign of “rhabdo.”
-Serious muscle injury
Sources: Urinecolors.com Merck.com Residentandstaff.com