agreed.
also, you're not suppost to drink Distilled Water. something about exploding cells.
The distilled water dissolves a lot of minerals that your body needs. If your kidneys don't get rid of it soon enough, your organical fluids become too diluted to live.
But it's not just distilled water. Too much 'normal' water is bad for you, for the same reason. Utterly pure water isn't much worse than tapwater-pure. Particularly bad examples of tapwater notwithstanding, though I can't imagine that any potable sample of water (up to and including one with an 'ideal' mix of isotonic salts/etc) could not continue to dissolve more salts, and thus dilute the body's own systems when imbibed.
You might want to read as a frexample (but ignoring some of the reader-comments) something like:
http://news.bbc.co.uk/1/hi/magazine/6263029.stmBeer (apart from the "hic"-quotient) was only really more popular in times past because the water you got through it (either treated by the brewing process, or 'diluting'/eradicating the nastiness in water by after-the-fact diultion) was better than most plain water supplies (i.e. in areas with a non-minimal population density affecting the quality). Which in DF terms means that the Original 7, upon arrival in pristine lands, shouldn't have a preference towards beer and against water if they have a river flowing through it without any industrialisation or bodily fluids (most notable blood) currently affecting it. Maybe when you start to reach a significant proportion of the immigrant population cap, but I think dwarfs just like beer/ale/wine/etc. Not as an overriding physiological thing, but certainly a racial tendency with suitable adaptations to their biology. Like how carrion eaters can deal with rotting meat. (There's no reason why they
can't deal with fresh meat, aside from the specialisations that haven't the physical ability to consume flesh until it loses a certain material integrity, but their biological imperative keeps them away from it and/or trying to kill certain prey themselves because those that did found themselves in dangerously close competition with the primary predators... Or suchlike. That part's not intended as a direct and fully-paralleled analogy.)
But who knows? Well, apart from Toady, that is...