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The public has recently been confronted with many, often conflicting, recommendations about diet and reducing the risk of coronary heart disease (CHD). Dietary recommendations to the community designed to lower the risk of CHD should be specific, clear, and brief. People should be advised to reduce their intake of foods that are high in saturated fats and replace these partially with foods that are relatively high in polyunsaturated fats. This will lower both total fat and dietary cholesterol intakes and will also change the ratio of polyunsaturated to saturated fats.
Shaper et al. (Sat,) studied this question.