Is distilled water is safe to drink?

Yes it is perfectly fine to drink, it is pure. The part about leeching minerals from your body, not sure where this myth came from, but it is not based upon any scientific fact and is literally a lie. Probably a rumour started by an individual or company that manufactures alternate filtration systems. The simple fact is that the human body can only use and absorb certain types of minerals (organic as opposed to inorganic) and only from certain sources. The human body is designed to get it's minerals from foods, not from water and so the best thing we can do for our water is make it as pure from toxins and chemicals as possible.