University of Southern California study links ultra-processed foods to brain changes in children

A study conducted by the Keck School of Medicine at the University of Southern California has found a link between the consumption of ultra-processed foods and specific changes in children's brain activity. Part of the BrainChild project, the research followed 46 healthy-weight children aged seven to ten over a one-year period.

Using functional magnetic resonance imaging (fMRI), researchers observed that children with higher consumption of ultra-processed foods showed more intense activation in the dorsal striatum—a brain region associated with learning, motivation, and reward anticipation—when viewing images of appetizing foods. This activation was not observed in the ventral striatum, which is linked to immediate pleasure, suggesting these foods may drive a repetitive impulse to seek food rather than increasing immediate enjoyment.

The study also noted a stronger connection between the dorsal striatum and the insula, the area responsible for processing flavors and sensory signals. This heightened brain response was associated with increases in body mass index (BMI), body fat percentage, and waist circumference after twelve months. Researchers noted that while the study is observational and does not prove causation, understanding these mechanisms may assist in developing early interventions for childhood obesity.