There is not just one, but various methods of intermittent fasting that people follow. Some fast for 12 hours or 16 hours a day, others may fast for 2 days a week, or follow a weekly 24-hour fast.
Intermittent ... fasting involves cycling between periods of eating and fasting, with common methods including the 16:8 (fast for 16 hours, eat within an 8-hour window) or the 5:2 (five days ...
Another method is the 5:2, which is where you eat normally for five days, then restrict your calorie intake severely for the other two. “In a nutshell, intermittent fasting works,” NYC-based ...