A new study suggests that following a Mediterranean-style diet can lower the risk of developing dementia and slow cognitive decline, even in people with strong genetic predispositions. The diet, rich in vegetables, fruits, nuts, whole grains, and low in red and processed meats, was linked to healthier cognitive outcomes over a three-decade period.
APOE4 Carriers Benefit Most
One of the major genetic risk factors for Alzheimer’s disease, the APOE4 variant, can triple the risk with one copy and increase it up to 12 times with two copies. Researchers found that people who closely adhered to a Mediterranean diet showed the greatest protection, especially those with two copies of the APOE4 gene. The diet appears to influence key metabolic pathways in the body, potentially offsetting the harmful effects of genetic risk.
The study tracked more than 5,600 participants, monitoring long-term dietary habits, blood samples, genetic data, and cognitive function. While the sample was largely European and highly educated, the results highlight the potential of diet-based interventions to reduce dementia risk, even for those genetically predisposed. Researchers emphasize that further studies with more diverse populations are needed and suggest integrating genetic and metabolite testing into dementia prevention strategies.
