American Journal of Clinical Nutrition, Vol 50, 1382-1388, Copyright © 1989 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Comparison of the effect of canola oil and sunflower oil on plasma lipids and lipoproteins and on in vivo thromboxane A2 and prostacyclin production in healthy young men

BE McDonald, JM Gerrard, VM Bruce and EJ Corner
Department of Foods and Nutrition, University of Manitoba, Winnipeg, Canada.

The effect of dietary fatty acid composition on plasma lipids and eicosanoid production was studied in normolipidemic men. Approximately 75% of the fat in the diet was provided by a mixture of fats (MF) during the 6-d pre and postperiods and either canola oil (CO) or sunflower oil (SO) during the two 18-d experimental periods. Saturated, monounsaturated, and polyunsaturated fatty acids provided 14%, 15%, and 7%; 5%, 20%, and 10%; and 7%, 7%, and 22%, respectively, of total dietary energy in the MF, CO, and SO diets, respectively. The CO and SO diets produced similar decreases in plasma total (20% and 15%, respectively) and low-density lipoprotein (25% and 21%, respectively) cholesterol. Plasma high-density lipoprotein cholesterol and triglyceride concentrations were not altered by either fat source. Bleeding time was longer and in vivo 1-keto-PGF1 alpha production was greater (p less than 0.05) when on the CO diet than when on the MF diet. The hypocholesterolemic and antithrombotic effects of the CO diet were equivalent to those of the SO diet.

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