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Lipids

, Volume 30, Issue 4, pp 365–369 | Cite as

Fatty acid composition of erythrocyte, platelet, and serum lipids in strict vegans

  • Jyrki J. Ågren
  • Marja-Leena Törmälä
  • Mikko T. Nenonen
  • Osmo O. Hänninen
Communication

Abstract

The fatty acid composition of erythrocytes, platelets, and serum lipids was compared between subjects who had been eating a strict uncooked vegan diet (“living food”) for years and omnivore controls. The vegan diet contains equal amounts of fat but more monounsaturated and polyunsaturated and less saturated fatty acids than the mixed diet of the control group. In vegans, the proportion of linoleic acid was greater in all lipid fractions studied. Also, the levels of other n−6 fatty acids were greater, with the exception of arachidonic acid levels, which were similar in most fractions. In erythrocytes, platelets and serum phospholipid fractions, this increase was mainly at the expense of the n−3 fatty acids. The proportions of eicosapentaenoic and docosahexaenoic acid were only 29–36% and 49–52% of those in controls, respectively. In vegans the ratio of n−3 to n−6 fatty acids was only about half that in omnivores. In addition to the lower levels of n−3 fatty acids, the proportions of palmitic and stearic acids were lower in serum cholesteryl esters, triglycerides and free fatty acids of vegans. The proportion of oleic acid was slightly lower only in serum cholesteryl esters and erythrocyte phosphatidylserine. The results show that, in the long term, the vegan diet has little effect on the proportions of oleic and arachidonic acids, whereas the levels of n−3 fatty acids are depressed to very low levels with prolonged consumption of the high linoleic and oleic acid components of this diet.

Keywords

Linoleic Acid Fatty Acid Composition Cholesteryl Ester Docosahexaenoic Acid Vegetarian Diet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abbreviations

CE

cholesteryl esters

FFA

free fatty acids

PC

phosphatidylcholine

PL

phospholipids

PS

phosphatidylserine

TG

triglycerides

TLC

thin-layer chromatography

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Copyright information

© American Oil Chemists’ Society 1995

Authors and Affiliations

  • Jyrki J. Ågren
    • 1
  • Marja-Leena Törmälä
    • 1
  • Mikko T. Nenonen
    • 1
  • Osmo O. Hänninen
    • 1
  1. 1.Department of PhysiologyUniversity of KuopioKuopioFinland

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