You can fast for only 14 hours which can sometimes be enough fasting.
If you fast for 14 hours then you'll eat within an 8 hour window but to get better benefits from the intermittent fasting you should fast for 16 hours if possible.
Intermittent fasting for 16 total hours when intermittent fasting makes it to be more effective and for you to have a healthy metabolism.
You fast for 16 hours and only eat within an 8 to 10 hour window.
Intermittent fasting also has many other health benefits including better brain function, lower blood sugar levels, and lower inflammation which is all backed up by research.