The most common way is to do a 16-hour fast is to stop eating at 7-8 PM and finish it at 11 AM-12 PM the next day. You can start fasting at any point, no need to wait until the 1 January. If you get eight hours of uninterrupted sleep a night, you already have an eight-hour intermittent fasting period. If you don’t eat for the four hours before you go to sleep and for four hours after you wake up, you’re doing the 16:8 fast, meaning a 16-hour daily continuous fast with eight hours during which you can eat anything you want. Mattson says daily time-restricted eating, in which all calories are consumed within a six or eight-hour period each day, leaving 16-18 hours without food is easier than the 5:2 method for most Fasting Time. The most obvious difference between the two is the fasting time and the difficulty level. 12/12 allows you to eat for 12 hours during the day and fast for 12, while 16/8 has you fast for 16 hours and eat for 8. 12/12 is easier for the beginner intermittent faster because you can sleep through a majority of your fasting window and There are a lot of ways to do intermittent fasting, and a lot of self-proclaimed experts attempting to brand their specific formulations: there’s the 18/6 model (18 hours of fasting to a six-hour window in which you can eat normally), and the 16/8; there’s the 5/2 model espoused by Jimmy Kimmel, in which fasters eat normally for five days The times of fasting and eating within each day can be reasonably allocated according to personal preferences or living habits. Common time allocation methods are 16/8 (16 h fasting, 8 h free eating), 18/6 (18 h fasting, 6 h free eating), and 20/4 (20 h fast, 4 h free eating) . 5:2, 4:3 AD, 16:8, 14:10 etc, all give you some days per week where you have a period of fasting of at least 12 hours (usually more). However these programs fall into 2 distinct groups. 5:2, 4:3 and AD are examples of “intermittent fasting” that involve drastic calorie restriction on 2 or more days per week. The most common forms of intermittent fasting are the 18:6, 16:8, and 14:10 time-restricted eating plans, in which you abstain from food for 18, 16, and 14 hours per day, respectively. While breaking these types of fasts doesn't require quite as much planning as breaking an extended fast, there are still some general recommendations. LTgIjhr.