ABSTRACT
Dietary Fiber (DF) means carbohydrate polymers with ten or more monomeric units, which are not hydrolyzed by the endogenous enzymes in the small intestine of humans (Cui et al., 2011). As it possesses different health benefits including improving postprandial glucose response, reducing caloric intake, and decreasing total and Low Density Lipoprotein (LDL) levels (Mengmei et al., 2015), it has been used to prevent heart disease, obesity, and cancers (Elleuch et al., 2013; Huang, Ye, Chen, & Xu, 2013). The dietary fiber ingredients will be categorized into three groups: Insoluble Dietary Fiber (IDF), Soluble Dietary Fiber (SDF), and resistant starch. IDF are plant or food materials that are metabolically inert, absorbing water throughout the digestive system and easing defecation (Cui et al., 2011). It was mainly composed of cellulose, hemicellulose, lignin, original pectin, and chitosan (Zheng, 2001).
