Abstract
Olive leaves, one of the most abundant olive production by-products, have shown incredible potential for their characteristic bioactive compound composition, with unique compounds such as the polyphenol oleuropein. In order to evaluate the bioaccessibility of bioactive compounds present in an olive leaf extract, samples were submitted to an in vitro digestion process following INFOGEST protocol, and qualitative and quantitative characterization of the original extract and digestive samples at different times were carried out using HPLC-ESI-TOF-MS. The analyzed extract presented an abundance of phenolic compounds, such as secoiridoids, with oleuropein being the main identified compound. The in vitro digestion process showed an effect on the phenolic profile of the extract, with a lower recovery in the gastric phase and an increase at the beginning of the intestinal phase. Most of the studied compounds showed high bioaccessibility at the end of the digestion, with oleuropein, ligstroside, and quercetin-3-O-galactoside being among the ones with higher value. These findings show the potential for future use of olive leaf polyphenols. However, further research is needed in order to evaluate the absorption, delivery, and interaction of these compounds with the colon.
Highlights
The olive tree (Olea europaea L.) has been cultivated for centuries in the Mediterranean for the production of some of its most renowned products: oil and table olives
The phenolic profile of the present olive leaf extract was affected by the static in vitro digestion process
Degradation kinetics of major phenolic compounds in the bioaccessible fraction of samples showed similarity, with reduced concentration in the gastric phase, which increased in the first moments of the intestinal phase
Summary
The olive tree (Olea europaea L.) has been cultivated for centuries in the Mediterranean for the production of some of its most renowned products: oil and table olives. This area holds 98% of the crop area and 97% of the global production, with Spain being the first producing country [1,2]. The environmental implications of these processes have led to an interest in the search for new innovative processing alternatives In this respect, their reutilization has been proposed, as a way of propelling the circular economy and the development of products with high added-value
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
