Rates of childhood obesity have tripled in the past 30 years, and food marketing is implicated. Companies top $10 billion in marketing per year to pitch food and drinks to kids; 98% of the food products advertised to children on television are high in fat, sugar, or sodium. In a new study scheduled for publication in The Journal of Pediatrics, researchers used neuroimaging to study the effects of food logos on obese and healthy weight children.