“…Soy protein isolate (SPI) contains at lowest 90% protein (dry basis) and is a good substitute for meat protein because of its low-cost, less allergenic, and well-balanced essential amino acid composition (Day, 2013). SPI was reported to possess a myriad of health benefits, such as anticarcinogenic, antiinflammatory, and antioxidative, reducing cholesterol level (Jia, Tian, Zhang, Fan, & Zhao, 2019) and the risk of hyperlipidemia (Nishinari, Fang, Guo, & Phillips, 2014), inhibiting the promotion of liver tumors in mice fed a high-fat liquid diet (Eller & Reimer, 2010), which could offer novel applications in chemoprevention or adjunctive treatments (Chen & Hsieh, 2019). Because of its biodegradability, unique structural properties, and good processing performance, SPI is widely used as the biodegradable composite films (Jiang, Tang, Wen, Li, & Yang, 2007;Wang et al, 2014) and the carrier material in encapsulation of bioactive flavonoids in recent years (Wang & Wang, 2015).…”