Water is an interesting piece of our diets and lives. One thing I've noticed is that people seem to love ice-cold, filtered water (even in NYC, where we have exceptionally good tap water, my roommate bought a water filter and keeps it in the refrigerator). I personally like the idea of cold water but I realized I can't stand drinking it -- I'd rather have cool/room temperature tap water 9 times out of 10 times. People always give me funny looks when I say that or ask for it, though.

I'd totally believe that different mineral concentrations in water could lead us to different health outcomes. I also started taking a (highly bioavailable, to avoid diarrhea) magnesium supplement occasionally and the first time I tried it, I recall waking up the next morning feeling more relaxed than I'd felt in years. Maybe I'll try calcium, although I do consume a pretty solid quantity of dairy.