Food with lots of fats and carbohydrates triggers the reward system of the brain and why people become dependent on the not too healthy meals.
This conclusion was made by scientists at Yale University.
For the study, researchers showed subjects photos with a variety of food.
As the results, the contemplation of a photo of food high in fat, sugar and carbohydrates substantially affect the reward center of the brain much. They brought in more neurons than any other photo food.
Scientists assume that this reaction stems from the fact that junk food is relatively recent. Because of this, people have not yet learned to react calmly to it.