Time-restricted feeding: In this method, if someone consumes food at 7 PM, they can have their meal only the next day at 11 AM. It is the easiest as most fasting time is at night during sleep. The goal here is to extend the fasting period, done regularly. In 24 hours, the person will fast for 16 hours and eat in the remaining 8 hours window. n2. Alternate day fasting: People can eat whatever they want on a feast day. There are no restrictions on the quantity or the food's timing. During the day of the fast, they consume nothing but water. The other variant of this fasting is that around 500 calories of food are allowed.n3. Whole day fasting: On feeding days, people consume regular food, whereas, on fasting days, people consume only 20–25 per cent of total daily calorie requirements.