I've never been able to do this one. Not eating for an extended period (12 hours if overnight, much shorter during the day) leads me to one sort of gastric distress or another. Some are only uncomfortable, and others are downright distressing. I thought this would go away as I aged (I assumed when I was younger it was simply because of my runaway metabolism). But I still can't skip lunch without consequences.4) Give you GI tract a break from digestion (time-restricted eating)