A long-term study published in Nature Medicine suggests that following a Mediterranean-style diet can significantly reduce the risk of dementia, even for people with a genetic predisposition. Researchers found that individuals with diets rich in vegetables, fruits, nuts, whole grains, and low in red and processed meats were less likely to develop dementia and showed slower cognitive decline over three decades.
Impact on Genetic Risk Factors
The protective effects were strongest in participants carrying two copies of the APOE4 gene variant, which greatly increases Alzheimer’s risk. About 25% of people carry one copy of APOE4, while 2–3% carry two. Although the gene raises the likelihood of Alzheimer’s, it does not guarantee its onset. Study author Yuxi Liu emphasized that dietary strategies, particularly the Mediterranean diet, could play a crucial role in mitigating genetic risks by influencing key metabolic pathways. While further research in more diverse populations is needed, the findings highlight the potential of diet to complement medical and genetic approaches in dementia prevention.
