I have heard for years and years that “the other parts of 4chan” than /b are good, but I’ve never seen it myself.

I have fasted for three straight days on many occasions and it was pretty easy for me. Drinking zero-calorie beverages (coffee, tea, water) should be fine. This is not professional medical advice and definitely do not do this if you are an alcoholic, diabetic, or pregnant. Once you break the fast, do so with moderation.