Like in the other comments, you can drink distilled water as long as you only drink a "normal amount".

It's still an interesting thing to know, that you actually starve when drinking large quantities of distilled water (well, in theory since you have other stuff in your body that enriches the water with minerals anyway).

Through osmosis the cells on your mucosae will try to equalise the mineral content between the water and themselves. But since distilled water has no minerals they will take in so much water that they burst.

If you would drink liters and liters of distilled water, the cells responsible for taking in minerals will all be gone and you starve long-term.

Short-term you die from organ failure anyway, with your body desperately trying to keep in the minerals. This is the same as the good old water intoxication. Just that you reach that threshold faster with distilled water.

it basically is, although most distilled water does contain a small amount of contaminants, so it would likely not count as cemically pure.

as for drinking it: i've found this article, according to which you shouldnt expect health problems, provided you eat a healthy diet. As most minerals we consume come from our food, not the water.

then again it supposedly tastes bland, is more expensive than tap water (provided your tap water is safely drinkable) and why even take the risk?

"Purified water is water that has been mechanically filtered or processed to remove impurities and make it suitable for use. Distilled water was, formerly, the most common form of purified water, but, in recent years, water is more frequently purified by other processes including capacitive deionization, reverse osmosis, carbon filtering, microfiltration, ultrafiltration, ultraviolet oxidation, or electrodeionization. Combinations of a number of these processes have come into use to produce ultrapure water of such high purity that its trace contaminants are measured in parts per billion (ppb) or parts per trillion (ppt). "

https://en.wikipedia.org/wiki/Purified_water

It is and you shouldn't drink it. At least not a lot of it or for a long time, otherwise your electrolytes could get to low. And while I don't remember the specifics(biology class was like 15 years ago), I think that can make the osmosis between your cells and your blood not work anymore or even reverse.