Researchers have claimed that cognitive tests are performed better in individuals who consume more than 80 grams of fish every day.
Norwegian scientists have reported elderly men and women who ate fish more frequently scored better on memory, visual conception, spatial motor skills, attention, orientation, and verbal fluency tests compared with their peers who did not have fish in their daily diet.
The findings show consuming fatty or lean fish as the main meal is associated with a significantly better performance in five of the six cognitive tests, whereas those who ate processed fish or fish sandwiches performed three of the cognitive tests better.
It was also reported that the seniors who consumed only fish oils performed better on just one of the tests. Scientists are looking forward to determining whether the cognitive benefits from consuming fish and seafood depend on the type of fish or their cooking method.
Another study published in the Archives of Neurology also suggests dietary intake of fish is inversely associated with cognitive decline in the elderly population.
However, there were no consistent associations with omega-3 fatty acids, although the effects were in the direction of slower cognitive decline.