Many years ago, the food industry managed to figure out that they could sell more food if it had a lot of sugar, fat, and salt in it. Good food should make you feel full and satisfied. But foods that are high in sugar, fat, and salt have the opposite effect on many people. Instead of easing our hunger, these foods make us want to eat more. Even when we're full, even when we're not hungry, we feel the need to eat. Hijacked helps us understand what it is that we're eating and helps us train our brains to know when to stop eating and to stop craving food.