Barely Significant

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The fast detection of Extra Virgin Olive Oil (EVOO) adulteration with poorer quality and lower price vegetable oils is important for the protection of consumers and the market of olive oil from fraudulent activities, the latter exhibiting an increasing trend worldwide during the last few years.
Therefore, it becomes clear that the absorption bands corresponding to chlorophyll and carotenoids systematically follow a decreasing trend by increasing the concentration of pomace oil, as the latter contains much less, if any at all, of these ingredients (as can be seen from the absorption spectra shown in Supplementary Figure S1 ).
These results may be related to the color changes that germ undergoes during cooking due to the formation of brown pigments due to non-enzymatic browning and caramelization reactions, characterized by an increase in L* values, a decrease in a* values, and the lack of a clear trend in the yellow b* color as the heating time and temperature increase [ 56 ].