5) Alternate day fasting method:

This is a straightforward method of intermittent fasting where you fast for a full 24 hours without food, but you can drink unsweetened coffee, tea, or water basically any calorie-free beverage about every other day, and eat freely for the next day.
There are many variations to this method some people don’t fast completely but restrict their caloric intake to 25 % of their energy requirements consuming about 500 calories on fasting days which makes this plan more sustainable and tolerable than full fasts, but it was found that alternate-day fasting didn’t produce superior weight loss results compared with daily calorie restriction over time and many people found it very difficult to follow for a long time.