Improved viability of probiotics by co-encapsulation of wheat germ oil under storage and gastrointestinal conditions: Effects of drying methods and wall composition

文献类型： 外文期刊

第一作者： He, Bao-Lin

作者： He, Bao-Lin;Cui, Rui;Wu, Hong;Hu, Teng-Gen

作者机构：

关键词： Lactiplantibacillus plantarum WH021; Wheat germ oil; W1/O/W2 emulsion; Co-encapsulation; Drying method; Storage stability

期刊名称：FOOD HYDROCOLLOIDS （ 影响因子：12.4； 五年影响因子：13.3 ）

ISSN： 0268-005X

年卷期： 2025 年 158 卷

页码：

收录情况： SCI

摘要： To improve the viability of probiotics during food storage and gastrointestinal digestion, this study developed solid microcapsules co-loaded with probiotics and wheat germ oil using W1/O/W2 emulsion pre-encapsulation, followed by spray drying (SD), freeze drying (FD) and spray freeze drying (SFD), respectively. The effects of drying methods and wall materials on the microstructure, physicochemical properties, storage stability, and gastrointestinal tolerability were highlighted. Firstly, all samples showed high encapsulation efficiency for probiotics (86%-99.2%) and wheat germ oil (72%-85%), low moisture content (2.8%-5.3%) and hygroscopicity (6.3%-11.6%), and wall materials exhibited structural stability during the drying process. The results of viable cell counts indicated that SFD caused more damage to bacterial cells than the other two drying methods, as evidenced by the total death of encapsulated probiotics within 90 days. In contrast, SD and FD encapsulated probiotics remained at 8.8-9.9 log CFU/g after 150 days of storage at 4 degrees C and 25 degrees C. Furthermore, the viability of probiotics in the co-encapsulated and pectin-added microcapsules was significantly enhanced in storage stability and simulated gastrointestinal digestion tests. Based on the above results, it was suggested that the coencapsulation strategy of combining the W1/O/W2 structure and SD or FD to prepare microencapsulated powders can obtain probiotic products with high activity and high stability. Meanwhile, composite wall material (whey protein isolate and pectin) could enhance probiotics' protective effect and colonic targeted release behavior. In conclusion, the current research provides a valuable reference for the application of probiotics and functional oils in the food industry.

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