How could water possibly draw minerals out of your body? And then where would they go?

Other bottled waters taste horrible to me, and/or make my mouth VERY dry... which doesn't make much sense, but I have read that some bottled water has minerals added that supposedly act as a drying agent.... so they say.

I grew up drinking good well water. Hard water. SO good. But I don't have that anymore. I find distilled water to be the least offensive of all bottled water I have tried.