Mediterranean diet tied to slower mental decline

NEW YORK Wed Dec 29, 2010 5:43pm EST

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NEW YORK (Reuters Health) - People who eat and drink like the Greeks may think a little more clearly into old age, hints a new study.

The findings add to a handful of evidence that a Mediterranean-style diet may be as good for the brain as it is for the rest of the body.

Traditionally associated with the consumption of a lot of wine, fruits, vegetables, legumes, olive oil and fish -- and with very little red meat -- the Mediterranean way of eating has been credited with helping to prevent various ailments, including heart disease, cancer and diabetes, lead researcher Christine Tangney of Rush University Medical Center in Chicago told Reuters Health in an e-mail.

To determine if slower brain aging might join the diet's list of potential health benefits, Tangney and her colleagues looked at the dietary habits and cognitive function of nearly 4,000 Midwesterners aged 65 and older.

The researchers gave participants two different diet scores, one reflecting adherence to the traditional diet of the Greek population and another based on how well participants met the 2005 U.S. Dietary Guidelines.

The participants' cognitive decline was assessed every 3 years, based on measures such as word memory and basic math skills.

Out of a maximum score of 55 on the MedDiet scale reflecting a quintessential Greek diet, the average study participant received a 28. And those with higher MedDiet scores appeared to have slower cognitive decline over time, even after accounting for other factors such as education, report the researchers in the Journal of Clinical Nutrition.

The differences had practical significance. If there were two older adults of the same age with Mediterranean diet scores 10 points apart, for example, the individual with a 10-point higher score would perform mentally as if she or he was 3 years younger than the other adult, explained Tangney.

Meanwhile, "better" scores based on the U.S. Dietary Guidelines -- which gave less weight to fish, legumes and moderate alcohol intake compared to the Mediterranean diet score -- did not appear to influence rates of cognitive decline.

The researchers point to some explanations for the effects, such as wine's potential role in protecting the brain from damage. Traditional Mediterranean foods may also reduce oxidative stress and the inflammation that is thought to play a role in Alzheimer's disease.

Tangney also noted that the findings are consistent with other studies in New York and France that found a reduced risk of cognitive impairment and Alzheimer's disease among those with higher Mediterranean diet scores, despite using different methods of measuring adherence to the diet.

Further research is still needed to confirm whether eating like a Greek will help maintain sharp mental faculties, the authors note. But one advantage of following a more Mediterranean diet is the ability to focus on specific foods rather than just single nutrients.

"Incorporating more vegetables, more olive oil, fish and moderate wine consumption coupled with greater physical activity is good for our aging brains," said Tangney.

SOURCE: American Journal of Clinical Nutrition, online December 22, 2010.

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Comments (3)
This isn’t the first scientific study pointing to positive conclusions about the effects of a Mediterranean diet on body and brain, but I’m no less impressed. Still, I have the misfortune not liking Greek dishes. Time for me to man up and stop whining because my brain deserves to age with grace. Thanks for the article.

Dec 30, 2010 4:53pm EST  --  Report as abuse
paintcan wrote:
A study of the “Mediterranean diet” should also include Italy, Southern France, southern Spain and North Africa.

It probably doesn’t include the Levant because they all seem to be getting dumber as they get older. Any place that has been wracked by such persistent conflict must have some problem with their cognitive abilities?

Dec 31, 2010 10:58am EST  --  Report as abuse
hariknaidu wrote:
What she doesn’t say anything at all about is the factor value of antioxidant called *garlic*. when garlic is added to olive oil with onion and other herbs, I find that it not only increases appetite but also nurishment including may be thinning of the blood. Greek diet is ancient and in their sunny climate is filled with milk products which are also seasoned for taste. They’re absolutely delicious and good for digestive process also.

May be the ultimate study will not only consider the chemical value and/or impact of residues in red wine but also fat burners like Tuscan beans and lentils.

Dec 31, 2010 1:08pm EST  --  Report as abuse
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