4. Conclusions
With this study we pretended to evidence lipidomics promising analytical
ability to identify the differences in both PL and TAG profile of
eggs fromhens raised in different conditions. In spite of the small number
of samples, the results indicate that the lipidomic approach
employed in this study is efficient in differentiating the selected samples
which was provided from hens with different feed and raising conditions.
Nevertheless the differences identified enabled us to realize that
eggs from different origins may interfere with human nutrition, since
eggs from hens raised outdoors and fed with vegetable and organic origin
food expressed a low n-3/n-6 ratio in comparison with eggs from
the remaining conditions. In that extent, the TAG and PL profile of
eggs could be used as a reliable proxy to track eggs origin according to
hen's diet and raising environment.
Even though further studies with a higher number of samples and
with samples fromdifferent areas and seasons are needed to specifically
track the specific relationship between hens feed or raising condition
with yolk lipid profile. Even so these results prove that lipidomics can
be potentially useful for producers and companies that manufacture
foodstuff-containing eggs to add value to their products by means of
product validation as well as it allows correlating hens' diet and eggs
nutritional value.