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Edta and Α-Tocopherol Improve the Chemical Stability of Astaxanthin Loaded Into Nanostructured Lipid Carriers Publisher



Tamjidi F1 ; Shahedi M1 ; Varshosaz J2 ; Nasirpour A1
Authors

Source: European Journal of Lipid Science and Technology Published:2014


Abstract

Nanostructured lipid carriers (NLC) as a promising delivery system have specific advantages over other nanocarriers for food applications. This study was aimed to evaluate the effect of different antioxidants on physical and chemical stability of NLC containing astaxanthin, a hydrophobic nutraceutical. Antioxidants (EDTA, ascorbic acid, α-tocopherol, coenzyme Q10) were added to aqueous and/or lipid phases. Tween 80 and lecithin were utilized as stabilizers; NLC formulations were produced by melt emulsification-sonication technique, and then stored at 35°C for 15 days. Except formulations with high levels of EDTA or ascorbic acid, others yielded small nanoparticles (Z-average ≈ 94nm) which were stable to growth during storage. Of these antioxidants, only EDTA and α-tocopherol increased the stability of astaxanthin without causing physical instability, and EDTA was more efficient. The utilization of α-tocopherol and EDTA in combination was more effective than using them individually. Storage temperature and artificial light had significant effects on the stability of astaxanthin in NLC. These results provide useful information for choosing antioxidants and storage conditions to further protection of nutraceuticals within NLC. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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