MONDAY, April 29 (HealthDay News) -- Eating fish, chicken, olive oil and other foods rich in omega-3 fatty acids while staying away from meats and dairy -- the so-called Mediterranean diet -- may help older adults keep their memory and thinking skills sharp, a large new U.S. study suggests.
Using data from participants enrolled in a nationwide study on stroke, the researchers gleaned diet information from more than 17,000 white and black men and women whose average age was 64.
The participants also took tests that measured their memory and thinking (cognitive) skills. During the four years of the study, 7 percent of the individuals developed problems with these skills, the researchers reported.
"Greater adherence to Mediterranean diet was associated with lower risk of incident cognitive impairment in this large population-based study," said lead researcher Dr. Georgios Tsivgoulis, from the University of Alabama at Birmingham as well as the University of Athens, in Greece.
There was no evidence of racial or regional differences in response to the diet. However, the diet did not help diabetics ward off mental decline, Tsivgoulis said.
"It may also be that the benefit of a Mediterranean diet differs in people with different diseases," Tsivgoulis said.
Because there are no definitive treatments for dementia, anything people can do to possibly delay the onset of symptoms, such as modifying their diet, is very important, Tsivgoulis noted.
The report was published in the April 30 issue of Neurology.
An earlier study published in the journal last year suggested that foods rich in omega-3s might help guard against Alzheimer's disease by affecting levels of a specific substance in the brain.
Dr. Sam Gandy, associate director of the Mount Sinai Alzheimer's Disease Research Center in New York City, said this latest study "is further support
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