Other examples of intermittent fasting are the 16/8 method, eat/stop/eat, alternate-day fasting, and Ramadan. The 16/8 method involves fasting for 14-16 hours per day and has an eating window of 8-10 hours. Eat/stop/eat is another method where you have 2 days of the week where you fast for 24 hours. Alternate-day fasting is when you eat normally for one day and then eat little to no calories the next day. Ramadan is a holy month of fasting observed by those who practice the Muslim faith. They fast from sunrise to sunset. This form of fasting is the most studied.