Study Reveals Plant-Based Diets In China, Japan & India Linked To Lower Alzheimer's Risk

A recent study conducted by researchers from the Sunlight, Nutrition, and Health Research Center in the United States has uncovered compelling evidence indicating that adopting plant-based diets, prevalent in countries such as China, Japan, and India, may significantly reduce the risk of Alzheimer's disease. The study sheds light on the contrast between these diets and the Western diet, highlighting how Alzheimer's rates tend to rise during the nutrition transition to Westernized eating habits.

Published in the Journal of Alzheimer's Disease, the study explores the intricate relationship between dietary choices and Alzheimer's disease prevalence. The researchers found a distinct pattern: as individuals in countries like China, Japan, and India shift towards a Western diet, the incidence of Alzheimer's disease increases. This underscores the potential protective effects of traditional diets in these regions compared to the dietary patterns prevalent in the West.

The study identifies specific risk factors associated with Alzheimer's disease, including higher consumption of saturated fats, red meat (such as hamburgers and barbeque), processed meats like hot dogs, and ultra-processed foods rich in sugar and refined grains. The research underscores the role of diet in modifying Alzheimer's risk, delving into how certain foods contribute to or mitigate the risk of dementia.

One of the key findings is that meat, particularly red meat, elevates the risk of dementia by influencing factors such as inflammation, insulin resistance, oxidative stress, saturated fat, advanced glycation end products, and trimethylamine N-oxide. Conversely, the study outlines several foods with protective qualities against Alzheimer's disease, including green leafy vegetables, colourful fruits and vegetables, legumes, nuts, omega-3 fatty acids, and whole grains.

The researchers also highlight the detrimental effects of ultra-processed foods, linking them to an increased risk of obesity and diabetes—both recognized as independent risk factors for Alzheimer's disease. Ultra-processed foods, unlike whole plant foods, lack essential components such as anti-inflammatory compounds and antioxidants that contribute to cognitive health.

Edward Giovannucci, Professor of Nutrition and Epidemiology at Harvard University, not involved in the study, emphasizes, "Evidence from diverse perspectives supports that a diet emphasizing fruits, vegetables, legumes, nuts, whole grains, and de-emphasizing meat, especially red meat, saturated fats, and ultra-processed foods is associated with a lower risk of Alzheimer's disease."

Giovannucci further notes that factors like physical inactivity and obesity also contribute to a higher risk of Alzheimer's disease, affecting various mechanisms believed to increase susceptibility, including inflammation, insulin resistance, and oxidative stress.

As the global understanding of Alzheimer's disease risk factors deepens, this study emphasizes the potential benefits of embracing plant-based diets, particularly in contrast to Western dietary patterns. The findings underscore the importance of dietary choices in shaping cognitive health and offer valuable insights for individuals seeking proactive measures to reduce Alzheimer's risk.

Also Read: Plant-Based Diets Transforming Food Choices Worldwide: Know More