Just 4 days of junk food may damage memory, study finds
A UNC study published in Neuron reveals that just four days of eating junk food can impair memory by overactivating CCK interneurons in the hippocampus. The high-fat diet disrupts glucose use in the brain, altering memory formation. Encouragingly, restoring glucose or intermittent fasting reversed these effects, showing diet's rapid impact on brain health.