Journal
COMPREHENSIVE REVIEWS IN FOOD SCIENCE AND FOOD SAFETY
Volume 20, Issue 5, Pages 4250-4277Publisher
WILEY
DOI: 10.1111/1541-4337.12792
Keywords
antioxidant interactions; lipophilization; oil-water interface; partitioning; phenolic antioxidants; polarity
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Funding
- Zhejiang Provincial Natural Science Foundation of China [LR20C200001]
- Zhejiang Provincial Key Research and Development Program [2021C02032]
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This article highlights the importance of utilizing natural phenolic antioxidants to inhibit lipid oxidation in emulsified food products, discussing the complexity of their inhibition mechanism and recent progress on modifying the polarity of antioxidants. It also elaborates on the partitioning behavior of phenolic antioxidants at the oil-water interface and the emerging phenolic antioxidants applied in food emulsions, emphasizing the interactions of polar-nonpolar antioxidants as a promising strategy for improved oxidative stability of emulsions.
There has been a growing interest in developing effective strategies to inhibit lipid oxidation in emulsified food products by utilization of natural phenolic antioxidants owing to their growing popularity over the past decades. However, due to the complexity of emulsified systems, the inhibition mechanism of phenolic antioxidants against lipid oxidation is rather complicated and not yet fully understood. In order to highlight the importance of polarity of phenolic antioxidants in emulsified systems according to the polar paradox, this review covers the recent progress on chemical, enzymatic, and chemoenzymatic lipophilization techniques used to modify the polarity of antioxidants. The partitioning behavior of phenolic antioxidants at the oil-water interface, which can be influenced by the presence of synthetic surfactants and/or antioxidant emulsifiers (e.g., polysaccharides, proteins, and phospholipids), is discussed. In addition, the emerging phenolic antioxidants among phenolic acids, flavonoids, tocopherols, and stilbenes applied in food emulsions are elaborated. As well, the interactions of polar-nonpolar antioxidants are stressed as a promising strategy to induce synergistic interactions at oil-water interface for improved oxidative stability of emulsions.
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