AI Article Synopsis
- The study examined how different carriers affect the antioxidant activity of α-tocopherol in oil-in-water emulsions.
- The antioxidant activity was assessed using a specific chemical reaction, showing that while free and encapsulated α-tocopherol showed similar effects, liposomal and niosomal carriers reduced oxidation products more effectively than micelles.
- Over time, lipid peroxides increased in emulsions with tocopherol carriers, suggesting that encapsulation may lower antioxidant activity due to α-tocopherol's better solubility in lipid droplets, making it less accessible for preventing oxidation.
Article Abstract
The effect of the antioxidant activity of α-tocopherol incorporated into different carriers on the oxidative stability of oil in water emulsion was investigated. The antioxidant activity of free and encapsulated α-tocopherol was measured in a 2,2-diphenyl-1-picrylhydrazyl reaction. Apart from α-tocopherol micelles, the samples showed similar antioxidant activity. The number of primary oxidation products in the emulsion with tocopherol liposomes and niosomes was lower than in the emulsion with micelles. During storage, the lipid peroxides gradually increased, whereas in emulsion with no α-tocopherol carriers added they remained constant. The content of the conjugated dienes first increased, and after 14 days at the end of testing time it remained stable in both types of emulsions. Our results might suggest that α-tocopherol when encapsulated into carriers exhibits lower antioxidant activity. The results obtained could be due to the better solubility of α-tocopherol in lipid droplets and thus the lower availability for the interfacial region, which is thought to be the place of the most pronounced lipid oxidation.
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| http://dx.doi.org/10.1016/j.colsurfb.2023.113536 | DOI Listing |
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