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This study was aimed to investigate the effect of bovine serum albumin (BSA) protein and the phenolic antioxidant 2,6-di-tert-butyl-hydroxytoluene (BHT, additive E-321) on the oxidation reactions taking place during in vitro gastrointestinal digestion of fresh and oxidized cod liver oil. Likewise, the potential degradation of BHT under these conditions and transformation into different metabolites was addressed. The technique employed to study the nature and amount of lipid secondary oxidation products, as well as the BHT-metabolites of low molecular weight, present in the digestates was studied by Solid Phase Microextraction followed by Gas Chromatography/ Mass Spectrometry (SPME-GC/MS). Based on the abundances of 90 volatile compounds detected in the headspace of the digestates, it could be observed that both BSA and BHT had a clear antioxidant effect. In the conditions of this study, the former showed to be more effective than the latter, specially in the case of oxidized oil digestion. In addition, it was highlighted that BHT notably degraded during digestion of oxidized oil. As consequence, the main volatile metabolites 2,6-di-tert-butyl-4-hydroxy-4-methyl-2,5-cyclohexadien-1-one (BHT-OH), 2,6-di-tert-butyl-2,5-cyclohexadien-1,4-dione (BHT-Q) and 3,5-di-tert-butyl-4-hydroxy-benzaldehyde (BHT-CHO) increased.

ekaia euskal herriko unibertsitateko zientzi eta teknologi aldizkaria

Bakailao-gibel olio fresko eta oxidatuaren urdail-hesteetako in vitro digestioa: BSA eta BHTren propietate antioxidatzaileen eta azken honetatik eratorritako metabolitoen azterketa