23/02/2026
Eating a diet high in sugar and fat may do more than affect weight and heart health. New research suggests it can interfere with how the brain handles memory and spatial navigation, even in young adults. In a controlled study, university students completed virtual navigation tasks that required them to learn landmarks, remember routes, and find locations using memory alone. Before testing, participants reported their usual eating habits, allowing researchers to compare brain performance with diet quality.
During the task, students explored a virtual maze and had to locate a target using environmental cues. If they failed, they were briefly shown the correct location and asked to remember it for the next attempt. In the final phase, the target was removed and participants relied entirely on memory. Students who reported eating more junk food performed significantly worse, struggling to recall directions and landmarks. Those with healthier diets showed stronger spatial memory and navigation skills.
The findings suggest that frequent intake of sugary and fatty foods may affect brain regions involved in memory and learning, even before obvious health problems appear. While the study focused on young adults and used virtual testing, similar effects have been observed in animal studies. The results do not prove permanent damage, but they highlight that diet quality may influence brain function much earlier in life than many people realize.
Research Paper 📄
DOI: 10.1038/s41366-025-01776-8
