"Omega-3 fats are good for your heart, but they can also be a boon to your waistline. Follow a low-calorie diet that includes more fish, and you'll drop more pounds than you would eating the same meal minus the seafood, suggests a study published in the International Journal of Obesity. One possible explanation: ounce for ounce, fish has fewer calories than almost all cuts of beef, pork and skin-on poultry. Researchers theorize that omega-3 fatty acids, the polyunsaturated fats abundant in cold-water fish like salmon and mackerel, switch on the fat-burning process in cells-provided you also exercise...."