Journal
COMPREHENSIVE REVIEWS IN FOOD SCIENCE AND FOOD SAFETY
Volume 22, Issue 3, Pages 1864-1901Publisher
WILEY
DOI: 10.1111/1541-4337.13134
Keywords
antioxidant; emulsifier; emulsion; oxidation; oxidative stability
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Emulsions play a vital role in food science, but their application in food production is hindered by physical and oxidative stability issues. This study aims to review oxidation and oxidative stability in emulsions, covering lipid oxidation reactions, measurement methods, and strategies to enhance stability. Different types of emulsions, including conventional and uncommon ones, as well as multiple emulsions, nanoemulsions, and Pickering emulsions, are considered. The comparative approach is used to explain oxidative processes in various parent and food emulsions.
Emulsions are implemented in the fabrication of a wide array of foods and therefore are of great importance in food science. However, the application of emulsions in food production is restricted by two main obstacles, that is, physical and oxidative stability. The former has been comprehensively reviewed somewhere else, but our literature review indicated that there is a prominent ground for reviewing the latter across all kinds of emulsions. Therefore, the present study was formulated in order to review oxidation and oxidative stability in emulsions. In doing so, different measures to render oxidative stability to emulsions are reviewed after introducing lipid oxidation reactions and methods to measure lipid oxidation. These strategies are scrutinized in four main categories, namely storage conditions, emulsifiers, optimization of production methods, and antioxidants. Afterward, oxidation in all types of emulsions, including conventional ones (oil-in-water and water-in-oil) and uncommon emulsions in food production (oil-in-oil), is reviewed. Furthermore, the oxidation and oxidative stability of multiple emulsions, nanoemulsions, and Pickering emulsions are taken into account. Finally, oxidative processes across different parent and food emulsions were explained taking a comparative approach.
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