For the study, researchers looked at data from the long-running Nurses’ Health Study of nearly 122,000 registered nurses between the ages of 30 and 55 who completed health questionnaires starting in 1976. Every four years the nurses were surveyed on their eating habits and between 1995 and 2001, researchers began testing memory in 16,000 of the nurses who by this time were over 70 years old.
Testing the subjects’ memory in two-year intervals, the researchers found nurses who ate the most blueberries and strawberries delayed their memory decline up to 2.5 years compared with those who did not report eating berries. The findings are published in the April 26 issue of the Annals of Neurology.
“What makes our study unique is the amount of data we analyzed over such a long period of time. No other berry study has been conducted on such a large scale,” study author Dr. Elizabeth Devore, a researcher in the Channing Laboratory at Brigham and Women’s Hospital and a professor at Harvard Medical School in Boston, said in a hospital news release. ”
Berries might provide a safe and easy way to boost brain power. Natural supplements for brain support may also be an effective way to stay focused.
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