`Mediterranean Diet Associated with a Larger Brain - Olive Oil Times

Mediterranean Diet Associated with a Larger Brain

Oct. 27, 2015
Sukhsatej Batra

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While sev­eral well-known stud­ies have found that the Mediterranean diet low­ers the risk of Alzheimer’s dis­ease, other stud­ies have failed to con­firm these find­ings. According to authors of a recent paper pub­lished in the jour­nal Neurology, dif­fer­ences in the meth­ods used and sub­jec­tiv­ity of clin­i­cal diag­no­sis may account for some of the incon­sis­tent results.

To remove bias in clin­i­cal assess­ment, researchers from Columbia University used MRI-based neu­roimag­ing to exam­ine the role of the Mediterranean diet on struc­tural changes that occur due to aging.

Higher fish and lower meat intake might be the 2 key food ele­ments that con­tribute to the ben­e­fits of the Mediterranean diet on brain struc­ture.- Columbia University Researchers

The inves­ti­ga­tors used spe­cific MRI bio­mark­ers to assess struc­tural changes, brain vol­ume and cor­ti­cal thick­ness of 674 elderly, demen­tia-free sub­jects, whose aver­age age was 80 years.

The mul­ti­eth­nic sub­jects liv­ing in north­ern Manhattan com­pleted food fre­quency ques­tion­naires which were used to cal­cu­late Mediterranean Diet Scores and deter­mine adher­ence to the Mediterranean diet.

Results of MRI mark­ers showed that sub­jects who had a higher Mediterranean diet score and higher adher­ence to the Mediterranean diet had larger total brain vol­ume, total gray mat­ter vol­ume and total white mat­ter vol­ume com­pared to those who had a lower adher­ence to the Mediterranean diet.
See Also: More Articles on the Mediterranean Diet
The ben­e­fit of higher fish intake and lower meat intake was also observed: Subjects who con­sumed more fish and less meat had larger total gray mat­ter vol­ume. Similarly, higher fish con­sump­tion was asso­ci­ated with larger mean cor­ti­cal thick­ness, while those who con­sumed smaller amounts of meat had larger total brain vol­ume.

The researchers also found that, when adjusted for age, those who con­sumed alco­hol in mod­er­a­tion in addi­tion to con­sum­ing more fish and less meat had larger brain vol­umes.

The results of this study imply that brain shrink­age, a nat­ural phys­i­o­log­i­cal change that occurs with aging, may be delayed by con­sum­ing the Mediterranean diet, a diet rich in fish, veg­eta­bles, legumes, fruits, cere­als, nuts and monoun­sat­u­rated fats such as those found in olive oil.

The authors of the study report that weekly intake of 3 to 5 ounces of fish and reduc­ing meat intake to less than 100 gram daily could pro­tect against brain shrink­age equiv­a­lent to 3 to 4 years of aging.

While the exact sci­ence behind these find­ings is not yet known, the study results show that the ben­e­fits of con­sum­ing the Mediterranean diet extend to delay­ing brain shrink­age asso­ci­ated with aging and may pre­vent cog­ni­tive decline.



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