Junk Food Harms an Unexpected Area – and Changing Your Diet Doesn't Always Help

A new study reveals that high-fat, high-sugar food damages the neural pathway linking the digestive system to the brain, and this damage may persist even after switching to a healthy diet. The study, conducted on mice, suggests that poor diet from a young age weakens memory mechanisms over time.

A new study reveals a link between a diet high in fat and sugar and memory impairment, through a neural pathway originating in the digestive system. Researchers found that the vagus nerve, which connects the body's organs to the brain, is activated by calories from food and increases the release of acetylcholine, a neurotransmitter essential for memory encoding. However, a chronic diet high in fat, sugar, and processed food from a young age damages this pathway, and the damage persists even after switching to a healthier diet. Mice fed such a diet performed worse on memory tests. The study, published via news agencies, highlights the importance of food quality not only for physical health but also for the brain, though further research in humans is still needed.