What about potassium?

"When i go out for a night of drinking, i usually wake up anywhere from 5-8lbs lighter, which tells me that im most likely hydrated."

jezum i want to party w/you! Have u tried NP's miracle adrenal mix. When my adrenals are screwed...i generally seem to pee MORE...probably due the body not holding onto elecrtolytes...therefore u can still be dehydrated while still chuggin down the h20 and sea salt IME.