A healthy plant-based diet, emphasizing whole, minimally processed foods like vegetables, fruits, whole grains, legumes, nuts, and seeds, may lower the risk of developing Alzheimer's disease and other dementias. This benefit may extend even to individuals who adopt such diets later in life.
Data from nearly 93,000 adults, tracked over a decade, revealed that participants consuming the highest amount of plant foods had a 12% lower dementia risk. However, diet quality proved crucial. Those adhering to the healthiest plant-based diets saw a 7% reduced risk, while those consuming unhealthy plant-based foods faced a 6% higher risk.
The study also highlighted the impact of dietary changes. Individuals who shifted towards unhealthier plant-based foods over 10 years experienced a 25% increased dementia risk. Conversely, those who improved their diets saw their risk fall by 11%. Crucially, adopting a healthier plant-based diet after age 60 was associated with a reduced risk of dementia.
While the study is observational and relies on self-reported data, its large sample size and extensive follow-up period strengthen its findings. Experts note that while diet is a significant factor, other lifestyle elements like physical activity and education also contribute to cognitive health.