but that isn't really really pure distilled water.

those distilled water u get in labs are distilled and condensed for at 3-4 times, hence it is 100% free of minerals and other contaminants.

when famine breakouts, i doubt people have the time and energy to conduct distillation a few times.

and it does not absorb minerals from the body la.    it causes osmotic imbalance which results in cells bursting.

I am from Engineering background.. not medical.. to me, the flow of substance is absorb

Pipe water, rain water, distilled water, deionized water. All drinkable. All are hypotonic. Drinking hypotonic liquids does not cause your cells to burst.

Nobody pees pure distilled water, so minerals are leaving your body all the time. If you switch from drinking pipe water to distilled water, you're reducing your mineral intake, but only very slightly. No pipe water contains even remotely the same concentration of minerals as urine.

You get minerals from your food too. In fact, practically all your mineral intake comes in your food.
http://www.who.int/water_sanitation_health...s/en/index.html

That is what I read, sorry if I am wrong...

that since distilled water are so pure, they tend to'absorb" other mineral/particles to get equilibirum....

I am more familiar with water properties from physical properties outside human body