Eating fish has been attributed as being good for cardiovascular health, but new research shows that it could also prevent Alzheimer's disease.

Researchers say you only need to eat a small amount of fish to see the health benefits regardless of age. As little as one serving a week could spell better health for your brain.

The study, conducted by the University of Pittsburg Medical Center, found that the 260 elderly people who ate baked or broiled fish at least once weekly over 10 years had larger volumes of gray matter in the part of the brain that controls memory -- and they were less likely to have Alzheimer's.

Dr. Abigail Holley says Alzheimer's disease is one of her older patients' greatest fears because treatment is rarely effective.

"We're learning more -- that blood vessels, blood flow to the brain and inflammation may have some role in the pathology," Holley said. "So, it's not a big leap to think some of the things tha are good for heart health might be good for brain health."

Holley said more research still needs to be done to confirm the study's findings, but said until that comes in, eating more fish comes with few risks. The only catch is that the fish should be baked or broiled, not fried.

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