Ok. Apologies. Not the nicest of subjects. But what colour urine do you guys have? From what I've read dark urine can be a symptom of liver problems but mine more often than not is REALLY dark. To the degree you can't see the bottom of the pan through it. It does vary but is always relatively dark.
I must admit I probably don't drink enough fluids but I wouldn't consider myself as anywhere near dehydrated.