The key to successful intermittent fasting (IF) is picking the correct IF strategy. Take into account the things you do regularly, the things you like, and the health outcomes you hope to achieve. The 16:8 approach (fast for 16 hours, eat within an 8-hour window), the 5:2 method (eat normally 5 days a week and limit calories on 2 non-consecutive days), and the alternate-day fasting method (alternate between fasting and eating days) are common IF programs.
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Try out a few different routines to see what works best with your lifestyle and gets you closer to your fitness goals. Before beginning IF, it is recommended that those with preexisting health conditions speak with their doctor.