Here’s something to consider when thinking about dining offerings: Eating more fish and plant-based foods and less meat and dairy may help keep the brain young, according to a study published online by the journal Neurology.

Researchers found that those who followed the diet had a larger brain volume than people who did not follow it. The difference between the two groups equaled five years of aging.

“These results are exciting, as they raise the possibility that people may potentially prevent brain shrinking and the effects of aging on the brain simply by following a healthy diet,” study author Yian Gu, PhD, of Columbia University in New York City, said in a statement. “Eating at least three to five ounces of fish weekly or eating no more than 3.5 ounces of meat daily may provide considerable protection against loss of brain cells equal to about three to four years of aging,” he added.