Mixed

Higher consumption of an unhealthy 'Western' dietary pattern is independently associated with smaller left hippocampal volume in older adults, while higher consumption of a healthy 'prudent' dietary pattern is associated with larger left hippocampal volume.

Focus on eating a 'prudent' diet rich in vegetables, fruit, whole grains, and fish, while minimizing 'Western' foods like processed meats, fried foods, and sugary drinks. This dietary pattern is associated with larger hippocampal volume, a brain region critical for memory and mood, in older adults.