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Improving oxidative stability and release behavior of docosahexaenoic acid algae oil by microencapsulation
Author(s) -
Fu Jingjing,
Song Liang,
Liu Yunhang,
Bai Changjun,
Zhou Dayong,
Zhu Beiwei,
Wang Tong
Publication year - 2020
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.10309
Subject(s) - whey protein isolate , docosahexaenoic acid , food science , chemistry , spray drying , ingredient , lipid oxidation , polyunsaturated fatty acid , whey protein , starch , chromatography , biochemistry , fatty acid , antioxidant
BACKGROUND Spray‐dried docosahexaenoic acid algae oil (DHA AO) microcapsules were prepared using whey protein isolate and glucose syrup (WPI + GS), or sodium starch octenylsuccinate and glucose syrup (SSOS + GS), or whey protein isolate and lactose (WPI + L). The effect of the formulations on encapsulation properties, oxidative protection and in vitro oil release pattern of the resulting microencapsulates was investigated. RESULTS A high encapsulation efficiency of over 98% of DHA AO was obtained for microcapsules with all three wall materials. Among the wall materials, SSOS + GS exhibited a better micro‐particulation ability reflected by more uniform size and smoother surface of the formed microcapsules and no agglomerates. DHA AO microcapsules with all the wall materials showed good protection of the oil from oxidation during storage with an increasing order of WPI + GS, SSOS + GS and WPI + L. Moreover, microencapsulation significantly increased the release of DHA AO in the intestinal phase of the in vitro digestion process with an increasing order of SSOS + GS, WPI + GS and WPI + L, indicating the increased stability of the oil in the highly acidic gastric environment and the enhanced lipid digestibility in the small intestine. CONCLUSIONS The results suggest that it is possible to transform a highly oxidizable liquid functional food ingredient such as DHA AO into a stable and easy‐to‐handle solid powder through spray drying with properly selected wall materials. © 2020 Society of Chemical Industry