The diet is based on the concept of calorie shifting, a dieting theory born from
the idea that when you reduce your food intake suddenly, your body shifts into
"starvation mode," an evolutionary defense mechanism in which your body's
metabolism becomes more efficient in order to cope with an expected shortage of
food. By varying the number of calories each day you presumably trick the body
into not realizing that it is being confronted with a shortage of food, thus
preventing starvation mode.
the idea that when you reduce your food intake suddenly, your body shifts into
"starvation mode," an evolutionary defense mechanism in which your body's
metabolism becomes more efficient in order to cope with an expected shortage of
food. By varying the number of calories each day you presumably trick the body
into not realizing that it is being confronted with a shortage of food, thus
preventing starvation mode.