Striking findings from two large-scale studies and two smaller studies show that following the Mediterranean diet or the related MIND diet can reduce the risk of dementia by one-third! The studies were reported at the recent 2017 Alzheimer’s Association International Conference in London.
The first study (Neuroprotective Diets …. abstract, full text) looked at the eating habits of almost 6,000 older adults (average age of 68) enrolled in the Health and Retirement Study, sponsored by the U.S. National Institute on Aging. The study is representative of the total US population, and as such, the results are widely applicable to the general public. Specifically, following the Mediterranean or MIND diet in general leads to 30%–35% lower risk of cognitive impairment during aging. Especially notable is the fact that the benefits appear to be a ‘sliding scale:’ “The more people stayed on those diets, the better they functioned cognitively,” said lead researcher Claire McEvoy.
The second study (The Mind Diet and Incident Dementia, Findings from the Women’s Health Initiative Memory Study; sponsored by National Institutes on Aging) examined the MIND diet’s effectiveness for more than 7,000 women. Similar to the first study, women closely following the MIND guidelines were 34% less likely to develop Alzheimer’s disease, while those moderately following the guidelines were 21%–24% less likely to develop Alzheimer’s.
An important observation is that these diets were originally developed to help improve cardiovascular health. Thus, following these diets will provide potential protection for both brain and heart health.
The third study (from Sweden: Which Dietary Index May Predict Preserved Cognitive Function in Nordic Older Adults?) enrolled more than 2,000 people and found that those eating a healthy diet called the Nordic Prudent Dietary Pattern (a diet related to the Mediterranean and MIND diets) for more than six years experienced better brain health.
The fourth study looked at the problem in the opposite direction. It looked at 330 people (average age 80) who followed a dietary pattern encouraging inflammation (so a diet “opposite” to the Mediterranean/MIND diets). These people performed poorly on brain games, and MRI scans showed that they also had a smaller total volume of brain gray matter. So this study negatively corroborates the outcomes of the first 3 studies.
Here is the Alzheimer’s Association Press Release about the four studies:
Healthy Eating Habits May Preserve Cognitive Function And Reduce The Risk Of Dementia
And here are several media stories about the presentations:
Mediterranean style diet may prevent dementia
Mediterranean-style diet linked to lower risk of dementia
Fight Dementia With Food: Following A Mediterranean Diet May Improve Brain Health, Studies Suggest
Could the Mediterranean Diet Help Fight Dementia? Here’s What We Know
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