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American Journal of Clinical Nutrition, Vol 60, 195-202, Copyright © 1994 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Plasma lipid effects of three common vegetable oils in reduced-fat diets of free-living adults

W Insull Jr, A Silvers, L Hicks and JL Probstfield
Department of Medicine, Baylor College of Medicine, Methodist Hospital, Houston, TX.

We compared plasma lipid changes due to the polyunsaturated fatty acids (PUFAs) in partially hydrogenated soybean oil, corn oil, and sunflower oil fed in reduced-fat diets (22-26% of total energy). Each oil was the dominant fat in isoenergetic diets of centrally prepared foods consumed by 26 male and 35 female normolipidemic, free-living individuals. Test diets were consumed double-blind, alternating with self-selected diets for 5 wk each. The ranges of proportions of total fat were: 4.7-9.7% polyunsaturated fat, 8.9-14.2% monounsaturated fat and 5.4-7.4% saturated fat. All three diets lowered (P < 0.0001) total cholesterol (11%), LDL cholesterol (13%), and HDL cholesterol (10%), without triglyceride changes. We conclude that PUFAs at approximately 6% of total energy result in clinically relevant plasma cholesterol-lowering and that the proportion of polyunsaturated fat must be an important consideration when planning reduced-fat, reduced-saturated-fat diets.




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Copyright © 1994 by The American Society for Nutrition