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Upcycled orange peel ingredients: a scoping review on phytochemical composition, extraction techniques, and biorefinery strategies

2025-11-03Review article Open access
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dc.contributor.authorVilas-Boas, Ana A.
dc.contributor.authorMagalhães, Daniela
dc.contributor.authorGómez-García, Ricardo
dc.contributor.authorCampos, Débora A.
dc.contributor.authorCorreia, Marta
dc.contributor.authorPintado, Manuela
dc.date.accessioned2025-12-02T13:00:15Z
dc.date.available2025-12-02T13:00:15Z
dc.date.issued2025-11-03
dc.description.abstractBackground/Objectives: Orange peels (OP), a major by-product of the juice industry, are rich in bioactive compounds (phenolic compounds, pectin, carotenoids, and essential oils). Its valorization represents a promising route to reduce food waste and foster a circular bioeconomy. This review aimed to map scientific progress in OP upcycling, focusing on the extraction of bioactive ingredients for human nutrition and integrated biorefinery approaches aligned with zero-waste principles. Methods: A bibliometric analysis and a scoping review were conducted covering studies published between 2003 and 2023. Scopus database and VOSviewer was usedto identify research trends, hotspots, and gaps. Conventional and emerging green extraction methods were critically compared, and integrated biorefinery strategies for maximizing OP valorization were systematically assessed. Results: The analysis revealed an exponential rise in OP research over the past decade, reflecting growing interest in sustainable food waste valorization. Polyphenoland pectin-rich extracts are currently the focus of research and applications, driven by their high economic and nutritional value. Innovative multi-extraction and zero-waste biorefinery models have emerged, yet most remain at low technological readiness levels. Carotenoids and other bioactive compounds remain underexplored, and challenges persist regarding standardization and scalability. Conclusions: OP valorization is shifting towards integrated green extraction and biorefinery frameworks that address clean-label demands, promote circular economy goals, and align with the Sustainable Development Goals. Future research should prioritize (i) standardized protocols, (ii) scalable green extraction technologies, (iii) the inclusion of underutilized compounds such as carotenoids, and (iv) regulatory pathways to accelerate industrial translation.eng
dc.identifier.citationVilas-Boas, A. A., Magalhães, D., Gómez-García, R., & Campos, D. A. et al. (2025). Upcycled orange peel ingredients: a scoping review on phytochemical composition, extraction techniques, and biorefinery strategies. Foods, 14(21), Article 3766. https://doi.org/10.3390/foods14213766
dc.identifier.doi10.3390/foods14213766
dc.identifier.eid105021571311
dc.identifier.issn2304-8158
dc.identifier.other9d4533fa-4185-464e-be83-d60dc8480138
dc.identifier.pmcPMC12607384
dc.identifier.pmid41227736
dc.identifier.urihttp://hdl.handle.net/10400.14/55810
dc.identifier.wos001613002700001
dc.language.isoeng
dc.peerreviewedyes
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectCarotenoids
dc.subjectCircular economy
dc.subjectEssential oils
dc.subjectPectin
dc.subjectPhenolic compounds
dc.titleUpcycled orange peel ingredients: a scoping review on phytochemical composition, extraction techniques, and biorefinery strategieseng
dc.typereview article
dspace.entity.typePublication
oaire.citation.issue21
oaire.citation.titleFoods
oaire.citation.volume14
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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