The research published in the American Journal of Clinical Nutrition mirrors similar results from previous studies. If fish does protect the aging brain, researchers believe that the benefits probably come from the omega-3 fatty acids found most abundantly in oily fish like salmon, mackerel and albacore tuna.
August 14, 2009 --There is more evidence that fish is brain food. Researchers surveyed 15,000 older adults living in China, India or one of five Latin American countries. What they found is the odds of having dementia generally declined as fish consumption increased.