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Yolk lipids.

A Kuksis1

  • 1Banting and Best Department of Medical Research, University of Toronto, Canada.

Biochimica Et Biophysica Acta
|March 25, 1992
PubMed
Summary
This summary is machine-generated.

Egg yolk composition remains remarkably stable despite dietary changes, limiting its modification for health or nutritional goals. This consistency, however, ensures its reliable use in industries like baking and pharmaceuticals.

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Area of Science:

  • Biochemistry
  • Food Science
  • Animal Science

Background:

  • Egg yolk exhibits consistent lipid and lipoprotein composition.
  • Dietary and environmental factors have minimal impact on overall yolk lipid profiles.
  • Minor fatty acids in triacylglycerols show the most variability.

Purpose of the Study:

  • To investigate the stability of egg yolk composition.
  • To explore the potential for altering yolk composition through diet or genetics.
  • To assess the implications of yolk composition for industrial and nutritional applications.

Main Methods:

  • Analysis of lipid and lipoprotein composition in egg yolks.
  • Evaluation of dietary and genetic influences on yolk composition.
  • Assessment of physico-chemical and biological properties of yolk components.

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Main Results:

  • Egg yolk lipid class composition is minimally affected by diet, including cholesterol intake.
  • Genetic selection has not significantly lowered egg yolk cholesterol.
  • Production of polyunsaturated fatty acid-enriched eggs is not practical.
  • Egg yolk phospholipids are uniform and suitable for glycerophospholipid resynthesis.
  • Phosvitin acts as an effective metal ion chelator and antioxidant.

Conclusions:

  • Egg yolk's stable composition is advantageous for industrial applications (baking, cosmetics, pharmaceuticals) and liposome production.
  • The inability to significantly alter yolk composition makes it unsuitable for unlimited human consumption due to heart disease risks.
  • Egg yolk lipoproteins, particularly phosvitin, offer unexplored potential for nutritional, medical, and industrial uses.