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The increase in consumers demand for high-quality food products has led to the growth in the use of new technologies and ingredients such as RS. RS occurs basically in all starchy foods and has a long history as food source for humans. RS includes the portion of starch that can resist digestion by human pancreatic amylase in the small intestine and thus, reach the colon. His great nutritional interest is associated with his physiological effects, similar to those of dietary fibre. The regular consumption of certain subclasses of highly fermentable dietary fibre sources result in gut associated immune and microbiota modulation as well as a significant production of SCFAs. Among the different physiological roles of RS, its prebiotic effect is of great interest. RS can be considered prebiotic and it is not absorbed in the intestine. The best approach of prebiotic-probiotic symbiosis is achieved by encapsulation. But other food biocompounds can be encapsulated too using RS.

"Horchata" is a vegetable milk obtained from tiger nuts. The solid waste from horchata production was analyzed for physicochemical and microbial properties, aiming to determine its potential use as a fiber source for the food industry. The solid waste contains a high proportion of total dietary fiber (59.71 g/100 g), composed mainly of insoluble dietary fiber (99.8%). It has a high water-holding capacity (8.01 g/g) and oil-holding capacity (6.92 g/g) and a low water absorption (1.79 g/g) and water adsorption (0.23 g/g) capacities, in comparison with other dietary fiber sources. The emulsifying ability was 70.33 mL/100 mL, and the wastes showed high emulsion stability (100 mL/100 mL). The physicochemical properties indicate that tiger nut byproducts are rich in fiber and may be considered a potential ingredient in a healthy diet. However, the microbial quality was poor, meaning that it must be pasteurized prior to its addition to any food product.

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