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Junk Food Rewires Kids' Brains for More Cravings
26 Oct
Summary
- Ultra-processed foods trigger strong brain reward responses in children.
- Higher intake of these foods links to increased weight gain and body fat.
- Children's developing brains are highly sensitive to food environments.
Ultra-processed foods appear to be altering children's brains, creating a cycle of craving more unhealthy options. Research published on October 23, 2026, indicates that viewing images of items like cookies or fries elicits a significant response in the brain's reward system for children with high ultra-processed food intake. This neural activity is connected to a greater likelihood of weight gain and increased body fat.
Scientists emphasize that children's brains are in a sensitive developmental phase, making them highly impressionable to food cues and their surrounding food environment. Ultra-processed foods, often made from extracted food substances and additives, are a significant part of children's diets, with U.S. children getting about two-thirds of their daily calories from them.
The study, which analyzed 46 children, found that those consuming more ultra-processed foods showed stronger responses in the dorsal striatum, a region linked to reward and motivation, when shown food images. These stronger brain responses were also associated with subsequent increases in BMI and body fat.
While this study suggests a strong link, it cannot definitively prove causation. Researchers are planning a follow-up study to investigate cause and effect by providing healthier meals to children who consume ultra-processed foods and tracking their brain responses and weight changes.
