{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T23:10:31Z","timestamp":1790032231932,"version":"4.0.1"},"reference-count":49,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2021,10,21]],"date-time":"2021-10-21T00:00:00Z","timestamp":1634774400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003711","name":"Ministry of Science and Technology","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100003711","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004700","name":"Taipei Medical University","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004700","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Nutr."],"abstract":"<jats:p><jats:bold>Introduction:<\/jats:bold> Due to the enhanced awareness of consumers concerning healthy foods, homemade expeller-pressed oils have become popular worldwide. However, an extended storage period may lead to oxidization of the oil and exposure to hazardous byproducts by consumers.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> In this study, 10 pressed oil samples prepared from common oilseeds using a small-scale expeller oil press were analyzed by OXITEST with a sample amount of 5 g of oil and an oxygen pressure of 800 kPa under accelerated conditions for shelf-life projections. The oil properties were investigated, including the recovery, smoke point, acid value, iodine value, \u201cfatty acid composition, and contents of pigments and tocopherols\u201d.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> The autoxidation reaction of various expeller-pressed oils under an accelerated testing system followed zero-order Arrhenius kinetics (<jats:italic>R<\/jats:italic><jats:sup>2<\/jats:sup> &amp;gt; 0.99). Shelf-lives of the pressed oils at 25\u00b0C were estimated by extrapolation to range 105~1,089 days. The obtained shelf-lives were significantly correlated with log induction period (IP) values (<jats:italic>r<\/jats:italic> &amp;gt; 0.81, <jats:italic>p<\/jats:italic> &amp;lt; 0.05) and unsaturated fatty acids (UFAs) (<jats:italic>r<\/jats:italic> &amp;lt; \u22120.69, <jats:italic>p<\/jats:italic> &amp;lt; 0.05), but not with the iodine value, acid value, or smoke point. Scatter diagrams between shelf-lives and UFAs suggested that these pressed oils could be grouped by two linear regression curves (<jats:italic>r<\/jats:italic> &amp;gt; 0.98, <jats:italic>p<\/jats:italic> &amp;lt; 0.05). The predictive equations using multiple linear regression are presented herein, with predictor variables of UFAs and an unspecified item involving potential influencing factors such as tocopherol contents (<jats:italic>r<\/jats:italic> &amp;gt; 0.88, <jats:italic>p<\/jats:italic> &amp;lt; 0.05).<\/jats:p><jats:p><jats:bold>Conclusions:<\/jats:bold> Our findings first revealed that the UFA portion was partially correlated with the shelf-lives of selected expeller-pressed seed oils as estimated by the OXITEST. The derived equations can be applied for shelf-life predictions of expeller-pressed oils stored under dark ambient conditions based on the fatty acid profile.<\/jats:p>","DOI":"10.3389\/fnut.2021.763524","type":"journal-article","created":{"date-parts":[[2021,10,21]],"date-time":"2021-10-21T05:21:47Z","timestamp":1634793707000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":27,"title":["Application of OXITEST for Prediction of Shelf-Lives of Selected Cold-Pressed 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