Light or dark urine can have various causes, ranging in severity from 'needs attention' to 'very serious'. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose light or dark urine, we could:
|Ochronosis / Alkaptonuria||12%||Unlikely|
|Hemolytic Anemia||1%||Ruled out|
|Gallbladder Disease||0%||Ruled out|
What is the usual color of your urine, ignoring supplement (B-vitamin) yellowing, medications you are taking or other obvious factors?
Possible responses:→ Don't know
→ Light Yellow
→ Dark Yellow
→ Very dark or black
Although a very rare disease, the main outward symptom of ochronosis is black urine.