Effect of linusorbs on oxidative stability of lipid systems with different unsaturation and the antioxidant mechanism

The antioxidant capacity and mechanism of linusorbs (LOs) on lipid systems with different unsaturation was unclear. This study aimed to explore the oxidative stability of flaxseed oil (FO), walnut oil (WO), and camellia oil (CO) in the presence of LOs in order to recognize the impacts of unsaturation degree of the lipid systems on the performance of natural antioxidants. By the evaluation of fatty acid compositions, PV/CD and AV/p-AV value, and changes of characteristic peaks in Raman spectra, LOs can inhibit oil oxidation in different lipid systems, especially potent for C18:3-based FO, followed by C18:2-based WO, and C18:1-based CO. The inhibitory mechanism was indicated that LOs sacrifice themselves to terminate lipid peroxide and free radical, and the different inhibitory efficacy might be due to the different participation degree of LOs in the main chain reaction and side chain initiation of lipids oxidation principle.