> Why do you think distilled water robs you of _enough_ electrolytes to cause harm? There must be some real data or proof somewhere?

I didn't say it robs you of electrolytes, I said it doesn't contain electrolytes. If you don't take in electrolytes (minerals) from elsewhere then you will have a deficiency. This is fairly simple arithmetic -- if you replace something that has electrolytes (tap water) with something that doesn't have electrolytes (distilled water) and you don't change anything else, then you will intake fewer electrolytes overall.

This is the third time I've repeated this point, and you appear to misunderstand what I'm saying each time.

> I've read a lot of comments here claiming this

I think you've probably misread a lot of comments, thinking they said "distilled water robs you of X" when they actually said "distilled water doesn't contain X, and the normal source of X is tap water". The implication of the latter statement is that if you stop drinking tap water, you will have less of X unless you supplement it with something else.

> Don't you think it's odd that many believe something, yet it's so hard to find proof of it?

I find it odd that you appear to believe that electrolytes aren't necessary for the human body to function. I'm confused as to whether you believe that dehydration is real, and whether it is caused by lack of water and electrolytes (which is what medical science tells us). But here are references from the US Medical Library that I found on the first page of Google[1,2] that explain what electrolytes are and why they are necessary. They also contain references to the medical literature.

> According to this medical doctor distilled water is considered helpful against cancer, specifically stating no added minerals, vitamins or electrolytes.

Ignoring the appeal to authority[3], there are a few points that need to be made:

* A person who has cancer has quite different needs to someone who doesn't have cancer. Just because a temporary absence of nutrients/vitamins/minerals may help with cancer doesn't mean it will have a positive impact in people that don't have cancer. Chemotherapy and radiotherapy also help people who have cancer, but that doesn't mean that it's a good idea for a healthy person to go through that as well.

* He specifically said "temporary absence" meaning that the person should take in nutrients/vitamins/minerals after the fast. So if the argument is that "nutrients/vitamins/minerals aren't necessary for your health because if cancer patients stop taking them temporarily, they might improve their condition", this line of reasoning is also mistaken.

* He doesn't mention electrolytes specifically, but that doesn't really matter to the rest of the argument (since some minerals are electrolytes).

So I'm really not sure what you're trying to say by quoting that interview. Even if we assume that the doctor you quoted (in an appeal to authority) is not mistaken or misquoted, the implication you appear to be making is still incorrect.

[1]: https://medlineplus.gov/ency/article/002350.htm
[2]: https://medlineplus.gov/fluidandelectrolytebalance.html
[3]: https://yourlogicalfallacyis.com/appeal-to-authority