http://www.sciencedaily.com/releases/2011/11/111130095257.htmEating Fish Reduces Risk of Alzheimer's Disease, Study Finds
ScienceDaily (Nov. 30, 2011) — People who eat baked or broiled fish on a weekly basis may be improving their brain health and reducing their risk of developing mild cognitive impairment (MCI) and Alzheimer's disease, according to a study presented November 30 at the annual meeting of the Radiological Society of North America (RSNA).
"This is the first study to establish a direct relationship between fish consumption, brain structure and Alzheimer's risk," said Cyrus Raji, M.D., Ph.D., from the University of Pittsburgh Medical Center and the University of Pittsburgh School of Medicine. "The results showed that people who consumed baked or broiled fish at least one time per week had better preservation of gray matter volume on MRI in brain areas at risk for Alzheimer's disease."
Alzheimer's disease is an incurable, progressive brain disease that slowly destroys memory and cognitive skills. According to the National Institute on Aging, as many as 5.1 million Americans may have Alzheimer's disease. In MCI, memory loss is present but to a lesser extent than in Alzheimer's disease. People with MCI often go on to develop Alzheimer's disease.

This image shows a cutaway side view of the right side of the brain illustrating in red, green and yellow colors the beneficial effects of weekly fish consumption on gray matter volume. Hotter colors denote a stronger effect. As was seen with the left side of the brain, consuming fish on a weekly basis is linked to increased gray matter volume in the frontal cortex, posterior cingulate gyrus and temporal cortex on the right side of the brain. (Credit: Image courtesy of Radiological Society of North America)