Sorry! Misread that.
You can’t have a snack during the off hours.
Just kidding about the snacking...
I’ve done intermittent fasting and it’s a good program. I’ll often tie it to a Keto diet...which I also like. It’s not unusual to go for 48 hours without ill effects. Into 3 days, and I start getting weak. Four days is too much. If I expect to get physical labor done (around the house), I have to keep it to 48 hours max. But, you can lose some weight.