Journal
FOOD RESEARCH INTERNATIONAL
Volume 109, Issue -, Pages 82-90Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.foodres.2018.04.031
Keywords
Extra-virgin olive oil; Mass spectrometry; Mediterranean diet; Oleuropein; Lipid peroxidation; Antioxidant activity; Pro-oxidant activity
Categories
Funding
- Department of Life Sciences, University of Modena
- Reggio Emilia (research project FAR2016 Dieta Mediterranea e salute: riduzione dei fenomeni ossidativi durante la digestione della carne)
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Extra-virgin olive oil is an integral part of the Mediterranean diet and its consumption has been associated with a reduction risk of chronic diseases. Here we tested the potential of extra-virgin olive oil to limit the oxidative phenomena during in vitro gastro-intestinal co-digestion with turkey breast meat. The extra-virgin olive oil was particularly rich in oleuropein aglycone isomers, which represented the 66.8% of total phenolic determined with MS/MS experiments. Meals supplemented with extra-virgin olive oil equivocally affected lipid peroxidation. At low concentration (2.50/0 respect to meat), a significant inhibition of lipid oxidation was observed, whereas lipid peroxidation was greatly enhanced when the amount of extra-virgin olive oil was increased in the gastrointestinal system. The inhibitory effect observed at 2.50/0 extra-virgin olive oil was due to the antioxidant properties of extra-virgin olive oil phenolic compounds. At high concentration, extra-virgin olive oil phenolic compounds (especially hydroxytyrosol-derivative) behaved as pro-oxidants increasing the generation of lipid hydroperoxides from meat. At the same time, the presence in the digestive system of catalysers from meat induced the peroxidation of extra-virgin olive oil fatty acids, which was further intensified by the pro-oxidant activity of extra-virgin olive oil phenolic compounds. Our study underlined the importance of the timing and amount of consumption of extra-virgin olive oil as well as its phenolic composition in limiting the peroxidative phenomena on meat lipids during digestion.
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