You will undoubtedly have in mind the Fast diet or 5: 2 diet , conceived by Dr. Mosley and the journalist Spencer, who since last year has had a large following: for those who do not know it, the 5: 2 diet is the simplest diet on the face of the Earth. You are on a diet for only two days , with a maximum quota of 500 calories for women and 600 for men, while the other five days you can and should eat normally, without restrictions but without even bingeing. The two days of strict diet do not have to be consecutive. In short, it doesn’t get easier than this:  although two days of diet cannot work miracles, it cuts a little less than a standard low-calorie diet but burns more, precisely becausethe metabolism is pushed to burn on lean days as much as it burns in those when you eat normally.
The principle is that of intermittent fasting . By alternating the days of normal diet with those of calorie restriction, the body reacts with a faster metabolism. Since the diet has been quite successful, there have been some evolutions of the 5: 2 diet , most notably the 5: 2 protein diet with 650 calories of protein only two days a week, and Mimi Spencer’s 5: 2 diet for the beach. From this year the 5: 2 diet has also another variant, judged as “delicious” by American newspapers and various blogs : it is the Ethiopian 5: 2 Diet