Appetite goes away after 48 hours or so, and then it’s easy until appetite or hunger come back, which take 3-40 days depending on your health, fat reserves, etc.

I had lost my appetite that time, so even first two days were easy.

On phone, so hard to google, but there have been a few we’ll documented cases of people going a whole year with just water, vitamins and ridiculously little protein (losing 100-250 pounds of fat in the process).

Also google valter lungo - fasting 2-3 days at a time is very healthy for you.