Researchers from George Washington University followed the eating habits of more than 90,000 post menopausal women. Those who consumed at least five servings a week of broiled fish , rich in omega-3 fatty acids, had a 30 percent lower risk of heart failure.
But it's a whole different story if the fish was fried.
Those who had just one fried fish sandwich a week increased their risk of heart failure by 48 percent.
The report also finds darker fish, such as salmon and mackerel, have higher levels of omega-3 compared to white meat species such as tuna or sole.