When I was very sick with my mystery illness, I couldn't do IF or maintain an "eating window."

Now with me getting better, it is effortless; I skip breakfast, have a late lunch, and an early dinner. It works well.

So my point is that "good" fasting should also be effortless. Don't push it.

FWIW, I had an eating disorder for many years; a rather rare variation known as the binge/fast. While it's still a bad thing; it turns out to be much better for me than the binge/purge and binge/vomit choices.

I came out strongly against someone who showed up on the board bragging about a "dry fast" which means no food and no water; this is a very bad idea indeed.