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Darlene M. Dreon, MS, MPH, RD; Karen M. Vranizan, MA; Ronald M. Krauss, MD; Melissa A. Austin, PhD; Peter D. Wood, DSc

JAMA. 1990;263(18):2462-2466.

Abstract
The effect on plasma lipoproteins of exchanging fat type within currently recommended reduced-fat diets was studied in a free-living group of 19 men and 20 women who consumed both a polyunsaturated fat—enriched diet and a monounsaturated fat—enriched diet, each for a 12-week period, with saturated fat and cholesterol held constant. Mean plasma concentrations of low-density lipoprotein cholesterol and low-density lipoprotein total mass (analytic ultracentrifuge), and high-density lipoprotein (HDL) cholesterol and HDL total mass, did not change significantly on exchanging fat type. However, HDL₂ cholesterol concentration was 50% higher and HDL₃ cholesterol concentration was 7% lower for polyunsaturated compared with monounsaturated fat. Mean total mass of HDL₄ was also 23.5% higher and concentration of apolipoprotein B was 5.4% lower on transfer to the polyunsaturated fat diet. Contrary to frequent assertions, we find no advantage with respect to plasma HDL concentrations in using predominantly monounsaturated rather than polyunsaturated fats in subjects who consumed reduced-fat, solid-food diets.

(JAMA. 1990;263:2462-2466)

Author Affiliations
From the Stanford Center for Research in Disease Prevention, Stanford (Calif) University School of Medicine (Ms Dreon and Dr Wood); and Donner Laboratory, Research Medicine and Radiation Biophysics Division, Lawrence Berkeley Laboratory, Berkeley, Calif (Mss Dreon and Vranizan and Drs Krauss and Austin). Dr Austin is now with the Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle.

Footnotes
Reprint requests to Donner Laboratory, Lawrence Berkeley Laboratory, 1 Cyclotron Rd, Berkeley, CA 94720 (Ms Dreon).

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