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Am J Clin Nutr. 1986 Aug;44(2):220-31.

The relationship of dietary fat to plasma lipid levels as studied by factor analysis of adipose tissue fatty acid composition in a free-living population of middle-aged American men.


We have used adipose tissue biopsies to assess the quality of fat in the diet and its influence on plasma lipid levels in 413 free-living normolipidemic male subjects. Factor analysis identified three factors which separated the fatty acids on the basis of their chemical structure. F1--monounsaturates--animal fats; F2--saturates--carbohydrates; F3--polyunsaturates--vegetable oils. An increase in F1 was associated with an increase in plasma triglycerides (TG), plasma total cholesterol (TC), and VLDL-C: an increase in F2 led to a decrease in VLDL-C. A rise in F3 was associated with lowered TG, VLDL-C, and HDL-C but increased LDL-C. However, the contribution of each of these factors to the variance in TG, TC, LDL-C, and HDL-C was small, namely: 5.48, 1.30, 2.57, and 2.02%, respectively. A special relationship between F3 and VLDL-C was found such that 16.22% of its variance could be attributed to F3. Our conclusion is that adipose tissue composition and, by implication, the type of dietary fat intake, explains only a small proportion (1-19%) of the variance in plasma lipids in normolipidemic subjects.

[Indexed for MEDLINE]

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