Fish could prevent dementia, stroke, study says

A new study in the journal Neurology finds the benefits appear to come from fish rich in omega-3 fatty acids. In fact, eating fish such as tuna three times a week can reduce the risk of dementia or stroke by 26 percent.

But how the fish was cooked appeared to be important. There was no health benefits found in eating fried fish.

Besides tuna, other fish rich in omega-3's include salmon, mackerel, herring, sardines and anchovies.