[echoangle]

There would still be potassium in there, unless it’s pulled out by the frying oil.

Elements can’t get lost in a chemical reaction. You can only change the molecule they’re part of, so it might not be processable by the human body, but the potassium isn’t going to disappear.

[jaapz]

It's not going to dissappear, but it could dissolve into the cooking oil, leaving less in the finished product. This happens with boiling as well.

The fact that the element cannot physically vanish into thin air is not really relevant here

[echoangle]

It is relevant because I replied to this:

> Why would something being an element mean that heating it as part of a food wouldn’t act as a catalyst for some chemical interaction?

It sounds like the person thinks that chemical reactions can make elements change/disappear, which is not the case. And I specifically mentioned the Oil removing the potassium as an option.