The Food and Drug Administration announced Tuesday that it will require manufacturers to phase out partially hydrogenated oils, the primary source of artery clogging trans fats, from processed foods over the next three years.

Research shows that partially hydrogenated oils, found in some frozen pizzas, pies and other processed foods are not generally recognized as safe for use in food, the FDA said.

Though the healthy fats found in nuts are good for the heart, many doctors say trans fats are some of the worst fats people can consume.

Some popular foods that must shed their trans fat within three years include:  Margarine sticks, such as Blue Bonnet and Land O'Lakes.  Cake mix, such as Duncan Hines and Betty Crocker.  Even Microwave popcorn, such as Jolly Time and Jiffy Pop.

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