American Journal of Clinical Nutrition, Vol 51, 815-821, Copyright © 1990 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Effect of diets high in butter, corn oil, or high-oleic acid sunflower oil on serum lipids and apolipoproteins in men

GM Wardlaw and JT Snook
Division of Medical Dietetics, Ohio State University, Columbus.

This randomized blind crossover study compared serum lipid and apolipoprotein concentrations in 20 men consuming 37-43% of energy as fat from diets based on corn oil, high-oleic acid sunflower oil, and butter. Each phase of the crossover design included 2 wk of butter- based diet followed by 5 wk of designated vegetable-oil-based diet with a 7-wk washout period between phases. Compared with values for the butter-based diet, the vegetable-oil-based diets reduced serum total cholesterol by 16-21% (p less than 0.001), LDL cholesterol by 21-26% (p less than 0.001), triglycerides by 10-21% (p less than 0.01 for the higher figure), and apolipoprotein B-100 by 22-29% (p less than 0.001). When values fell, they fell further on the corn-oil-based diet. There were no significant changes in serum HDL cholesterol or apolipoprotein A-1. These data suggest that when men on diets high in saturated fatty acids reduce their saturated fatty acid intake but not their total fat intake, many can still experience a significant lowering in serum total cholesterol.

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