How do you do intermittent fasting? Most IF'ers consume for 8 hrs a day, not eating the various other 16 hrs. For how long do you have to quick for intermittent fasting? You could begin with a 12-hour quick as well as work your way to 16 hours. Many IFer's eat from 10-6, 11-7, or 12-8. It doesn't matter exactly what eating window you choose, equall