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American Journal of Clinical Nutrition, Vol 49, 269-276, Copyright © 1989 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Fatty acid composition of serum cholesteryl esters and erythrocyte membranes as indicators of linoleic acid intake in man

JF Glatz, AE Soffers and MB Katan
Department of Human Nutrition, Agricultural University, Wageningen, The Netherlands.

We compared the suitability of the linoleic-oleic acid ratio (L:O) of serum cholesteryl esters and erythrocyte membranes as indicators of dietary fatty acid composition. Forty-seven volunteers received a mixed natural diet with a polyunsaturated-saturated fatty acids ratio (P:S) of 0.2 for 3 wk and with P:S 2.0 for another 3 wk (HA group, 24 subjects) or vice versa (HY group, 23 subjects). Duplicate portion analysis revealed that dietary fat type was the only variable. The change in L:O in cholesteryl esters relative to the low P:S diet was 91.3 +/- 25.9% (means +/- SD) in the HA group and 85.1 +/- 18.8% in the HY group. The changes in erythrocyte membranes were 33.0 +/- 7.9% in the HA group and 22.8 +/- 4.9% in the HY group. Thus the effect on erythrocyte fatty acids was smaller but also less variable and the precision of the two measures was similar. Therefore the L:O of either blood component can be used as a marker of a subject's adherence to experimental diets differing in type of fat.




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Copyright © 1989 by The American Society for Nutrition