[RandomBacon]

I don't do fasts, but I can attest to hunger pains disappearing after a couple of days, and the fact most of it is mental.

I went from a 3000 calorie/day diet to a 1000 calorie/day diet for 8 months several years back. A few years after that, I once went 4 full days without food (it sucked, but I was mentally prepared due to my experience from that 3k to 1k diet change).

The change in energy will mess with your head/body for about a week until you get used to it.

Edit: People keep downvoting the parent, but I'm not sure why, just because the information comes from someone who does "fasts"?