How Junk Food Hijacks Your Brain | Serving Up Science

Why are we drawn to fatty, sugary, and salty snacks and drinks? We’re putting junk food under the microscope to explore the science behind our affinity for processed foods that pack a lot of calories and have little nutritional value. When we eat foods that contain lots of fat and sugar, it's the natural chemical dopamine that gives us a rush of elation and desire for more.