One type of polyunsaturated fat is
omega-
3 fatty acids, whose potential heart-health
benefits have gotten a lot of attention.
Omega-3s are found in fatty fish (salmon, trout, catfish, mackerel), as well as flaxseed and walnuts. And it's fish that contains the most effective, "long-chain" type of omega-3s. The American Heart Association recommends eating 2 servings of fatty fish each week.