Just how do you do intermittent fasting? The majority of IF'ers eat for 8 hours a day, fasting the other 16 hours. How long do you have to fast for intermittent fasting? You can start with a 12-hour rapid as well as function your means to 16 hrs. A lot of IFer's consume from 10-6, 11-7, or 12-8. It doesn't matter what eating window you choose, equa