Optionality We love diets that offer flexibility and can be tweaked to fit your lifestyle. The concept that one size fits all with diet plans just isn’t realistic. Intermittent fasting allows you to pick a schedule that works with your life. You can choose the 16-hour fast, where you fast for 16 hours a day and eat for 8. Or perhaps you don’t want to fast every day, so instead you choose the eat-stop-eat method, where you fast for 2 days a week (for a full 24 hours) and eat normally on the other 5 days.