Assessing the influence of Secoisolariciresinol diglucoside multi‐antioxidants on flaxseed oil's oxidative stability

Abstract

To increase the oxidative stability of flaxseed oil (FSO), combinations of two synergists (vitamin C, citric acid) and five distinct antioxidants (SDG (Secoisolariciresinol diglucoside), tea polyphenol (TP), resveratrol (RE), caffeic acid (CA), and vitamin E (VE)) were assessed. Based on the accelerated oxidation reaction at 65°C, the antioxidant effect was assessed for changes in the shelf‐life, fatty acid composition, peroxide value (POV), volatile and sterol contents of FSO. The SDG multi‐antioxidant combination, which included 0.01% SDG, 0.01% TP, and 0.02% vitamin C, demonstrated the strongest antioxidative qualities, according to the data; the POV of FSO dropped by 57.5% as compared to the blank group. Additionally, the SDG multi‐antioxidant combination outperformed 0.02% TBHQ (tertiary butylhydroquinone), increased the shelf‐life of FSO from 295 to 761 days, and postponed the deterioration of sterols and unsaturated fatty acids. Furthermore, the production of ketones and the degradation of esters and acids were diminished. In summary, the combination of SDG‐TP and vitamin C as antioxidants can be an effective natural alternative to artificial antioxidants to extend the shelf‐life of FSO.Practical Applications: Flaxseed oil utilizing multi‐antioxidant combinations has a wide range of practical applications. Multi‐antioxidant combination of flaxseed oil helps prevent cell damage and slows down the aging process. Antioxidant‐rich oils have numerous health benefits such as reducing inflammation, promoting heart health and improving digestive health. Multi‐antioxidant combination flaxseed oil is versatile and a valuable natural product that can be used in all aspects of daily life to improve overall health, It can provide a theoretical reference for the selection of antioxidants to improve the oxidative stability of flaxseed oil, provide a theoretical basis for the replacement of artificial antioxidants, and also provide certain technical support for the industrial application of flaxseed oil.