{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T13:30:19Z","timestamp":1787146219243,"version":"build-2736575974"},"reference-count":67,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T00:00:00Z","timestamp":1787097600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100009377","name":"Hunan Provincial Education Department","doi-asserted-by":"publisher","award":["24C0408"],"award-info":[{"award-number":["24C0408"]}],"id":[{"id":"10.13039\/100009377","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Hunan Provincial Department of Science and Technology","award":["2023JJ50276"],"award-info":[{"award-number":["2023JJ50276"]}]},{"name":"School-enterprise Cooperation Research Project","award":["2025Hx292"],"award-info":[{"award-number":["2025Hx292"]}]},{"name":"Hunan Provincial General Higher Education Institutions Science and Technology Innovation Team Support Project","award":["233"],"award-info":[{"award-number":["233"]}]},{"name":"Hunan Provincial Central Government-Guided Local Science and Technology Development Fund Project","award":["2024ZYC029"],"award-info":[{"award-number":["2024ZYC029"]}]},{"name":"Hunan Provincial Science and Technology Innovation Plan Project","award":["2025RC3283"],"award-info":[{"award-number":["2025RC3283"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>This study investigates the antioxidant efficacy and selectivity of a quercetagetin-rich extract (QG, 89% purity) from Tagetes erecta in soybean oil under accelerated storage conditions (65 \u00b0C, 56 days). Using gas chromatography\u2013mass spectrometry (GC-MS) fatty acid profiling, Headspace Solid-Phase Microextraction Gas Chromatography\u2013Mass Spectrometry (HS-SPME-GC-MS) volatile analysis, and Orthogonal Partial Least Squares Discriminant Analysis (OPLS-DA) chemometrics, QG at 200 ppm was compared against a solvent control and propyl gallate (PG). QG preserved polyunsaturated fatty acids 5.2-fold more effectively than the control (p &lt; 0.01), though it was less effective than PG in terms of overall Polyunsaturated Fatty Acid (PUFA) preservation. OPLS-DA-VIP analysis identified hexanal, hexanoic acid, and (E)-2-nonenal as preferentially suppressed volatiles (inhibition rates: 74.2%, 100%, and 81.2%, respectively), exceeding the average total volatile reduction (65.7%). A quantitative Selectivity Index (SI) combined with kinetic analysis supported preferential\u2014rather than non-selective\u2014inhibition of specific oxidation endpoints. Structure\u2013activity relationship analysis suggested that the selectivity of the QG-rich extract may be associated with the catechol B-ring and unique 6-hydroxyl substitution of quercetagetin, its major component. The extract\u2019s purity corresponds to a registered feed additive (Ministry of Agriculture and Rural Affairs (MOA) No. 618, 2022), ensuring industrial applicability. These findings establish the quercetagetin-rich extract as a promising selective natural antioxidant for PUFA-rich oils.<\/jats:p>","DOI":"10.3390\/molecules31162891","type":"journal-article","created":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T13:14:01Z","timestamp":1787145241000},"page":"2891","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Selective Inhibition of Lipid Oxidation by a Quercetagetin-Rich Extract from Tagetes erecta: A Chemometric Approach Using OPLS-DA and Selectivity Index Analysis"],"prefix":"10.3390","volume":"31","author":[{"given":"Xiuqiong","family":"Huang","sequence":"first","affiliation":[{"name":"College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China"},{"name":"Yuelushan Laboratory, Changsha 410128, China"},{"name":"Hunan Key Laboratory of Traditional Chinese Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mengxuan","family":"Fang","sequence":"additional","affiliation":[{"name":"College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ziyue","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qing","family":"Zheng","sequence":"additional","affiliation":[{"name":"College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhixing","family":"Qing","sequence":"additional","affiliation":[{"name":"Yuelushan Laboratory, Changsha 410128, China"},{"name":"Hunan Key Laboratory of Traditional Chinese Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianguo","family":"Zeng","sequence":"additional","affiliation":[{"name":"Yuelushan Laboratory, Changsha 410128, China"},{"name":"Hunan Key Laboratory of Traditional Chinese Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"345","DOI":"10.1146\/annurev-food-111317-095850","article-title":"Omega-3 Polyunsaturated Fatty Acids and Their Health Benefits","volume":"9","author":"Shahidi","year":"2018","journal-title":"Annu. 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