4) 5:2 method:

This method is a different approach to intermittent fasting as it splits the weekdays into 5 days where you eat normally and 2 non-consecutive days where you only consume 500_600 calories so it is not time restricting it is a calorie restricting plan it is also called (periodic fasting) or( the fast diet) which became popular in recent years by Michael Mosley’s book.
It highly encourages choosing high fiber high protein foods during the fasting period to get the most nutrition and to feel full for longer periods of time it also encourages to not compensate the fasting days by overeating during the other 5 days but be more mindful about the types of food you consume in modest amounts.