So Mozaffarian and his colleagues studied the studies,eight of them, in which some participants ate less saturated fat and more polyunsaturated fats, the kind of fats that are in fish,nuts, and vegetable oils.

VOA: standard.2010.03.25

And so,we wanted to do a systematic review of all the literature, find all of the appropriate studies and pool them to see if together, there's a benefit for replacing saturated fat specifically with polyunsaturated fat."

VOA: standard.2010.03.25

And so if that's not going to produce benefit, what sorts of replacements might?" Mozaffarian's study found that people who replaced saturated fat with polyunsaturated fat had about a 20 percent lower risk of heart attack or other heart disease.

VOA: standard.2010.03.25