The present study demonstrated that egg yolk antioxidant
activity is stable under simulated retail storage conditions, regardless of the type of egg i.e. omega 3/lutein enriched or normal table
eggs etc. The main contributory compounds to the yolk antioxidant
capacity, free amino acids and carotenoids, were remained stable
during the storage period of 35 days under refrigerated storage.
The MDA content was also stable, indicating that no significant
lipid oxidation occurred during storage. However, domestic cooking such as boiling and frying induced lipid oxidation and significantly reduced the antioxidant activity. Compared to fresh eggs,
a greater susceptibility to lipid oxidation was observed in stored
eggs, possibly due to the various physical-biochemical changes
occurred during the storage.