Francisca Rodrigues, Doretta Cuffaro, Ana Margarida Silva, Massimiliano Mirabeni, Simone Bertini, Marco Macchia, Maria Digiacomo
{"title":"Valorization of olive mill wastewater: improving the polyphenolic content, antioxidant potential, and cytotoxicity profile of extra virgin olive oil extract.","authors":"Francisca Rodrigues, Doretta Cuffaro, Ana Margarida Silva, Massimiliano Mirabeni, Simone Bertini, Marco Macchia, Maria Digiacomo","doi":"10.1002/jsfa.70232","DOIUrl":"https://doi.org/10.1002/jsfa.70232","url":null,"abstract":"<p><strong>Background: </strong>The extra virgin olive oil (EVOO) industry generates significant quantities of by-products, such as olive oil mill wastewater (OMWW), which could be valorized for their high bioactive compound content. The aim of this study was to investigate the positive impact of incorporating a polyphenol-rich extract from OMWW into EVOO extract, focusing on the improvement in polyphenol content, antioxidant properties, and effects on intestinal cell viability. Specifically, increasing concentrations of OMWW extract (1, 10, 20, and 50%) were added to the EVOO extract, and the preliminary screening based on antioxidant activity was assessed using a 2,2-diphenyl-1-picryl-hydrazyl (DPPH) radical scavenging assay.</p><p><strong>Results: </strong>The EVOO/OMWW 50% extract exhibited the highest DPPH radical scavenging activity (92.23%) and demonstrated superior antioxidant properties in comparison with pure EVOO and OMWW extracts. High-performance liquid chromatography (HPLC) analysis revealed enrichment of polyphenols in the selected EVOO/OMWW 50% extract. The antioxidant/antiradical activity of EVOO/OMWW 50% extract was further investigated through various assays, including 2,2'-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), ferric reducing antioxidant power (FRAP), and hypochlorous acid (HOCl) scavenging tests. Considerable activity was revealed, significantly superior to that of the EVOO extract. Furthermore, the extract did not exhibit any significant cytotoxicity in human intestinal cell lines (Caco-2 and HT29-MTX), indicating its safety for potential nutraceutical applications.</p><p><strong>Conclusion: </strong>These results suggest that the incorporation of OMWW into EVOO extract can improve its antioxidant/antiradical potential significantly, providing a promising approach for the valorization of OMWW waste in the enhancement of the EVOO nutraceutical properties. © 2025 Society of Chemical Industry.</p>","PeriodicalId":17725,"journal":{"name":"Journal of the Science of Food and Agriculture","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145213123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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