In general, a “heart healthy” diet, which emphasizes fruits and vegetables while avoiding saturated fats, is our best recommendation. A number of studies suggest that the Mediterranean diet, high in fish, olive oil, and vegetables is associated with a lower risk of dementia. Whether it actually prevents dementia will take a randomized study, where people are randomly assigned to alter their diet in a specific fashion.
Obesity, elevated cholesterol and diabetes are all recognized risk factors for dementia, so dietary and lifestyle changes that address these issues are likely to lower one’s risk of dementia.
