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Although several studies and reviews have investigated polyphenol extraction techniques, gaps remain in consolidating findings, optimizing extraction conditions, and understanding the synergistic effects of combined green extraction methods under comparable conditions. This systematic review critically evaluates environmentally sustainable approaches for maximizing polyphenol recovery from CBS for food applications. Literature searches were conducted in Web of Science, Scopus, and PubMed, and studies were selected according to the PICOS (population, intervention, comparison, outcomes, and study design) framework and PRISMA (Preferred Reporting Items for Systematic Reviews and Meta\u2010Analyses) guidelines. Thirty\u2010six articles published between 2010 and 2025 across 15 countries were included. The findings showed that green extraction technologies generally demonstrated higher polyphenol recovery, enhanced the stability and antioxidant activity of the recovered polyphenols, reduced extraction time, and lowered solvent consumption under optimized extraction conditions. However, combining green extraction techniques did not significantly increase total phenolic content compared with single\u2010technique approaches, suggesting that process intensification does not always improve extraction efficiency. Considerable variability in reported total phenolic content was observed in the reviewed papers due to differences in extraction conditions, solvent systems, and reporting units. Overall, CBS demonstrated strong potential as a sustainable source of polyphenols, while green extraction technologies provide a promising strategy for valorizing CBS into high\u2010value ingredients for functional foods, nutraceuticals, and natural preservatives.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/1750-3841.71433","type":"journal-article","created":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T04:39:35Z","timestamp":1789360775000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Green Extraction Techniques for Recovering Polyphenols From Cocoa Bean Shells for Application in Food Processing: A Systematic Review"],"prefix":"10.1111","volume":"91","author":[{"given":"Joy Chinenye","family":"Mba","sequence":"first","affiliation":[{"name":"Faculdade de Zootecnia e Engenharia de Alimentos (FZEA) Universidade de S\u00e3o Paulo (USP)  Pirassununga, S\u00e3o Paulo Brazil"},{"name":"Department 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