16:8 Dieting, this form of fasting requires a person to fast for 16 hours a day and eat meals during the remaining 8 hours.
5:2 Diet involves eating as you normally do 5 days of the week and restricting calorie intake to 500–600 on remaining 2 days.
24-hour fasting, this method requires a person to go without food for a complete day, i.e. 24 hours, has be done weekly once.
Alternate-day fasting, where you consume 500 calories only on fasting days, it may take couple of weeks for body to adapt.
Warrior Diet, it involves eating small amounts of raw fruits & vegetables during the day and eating one large meal at night.