The application discloses modified potato
resistant starch and application thereof in set yogurt, and comprises the following steps: adding
chitosan oligosaccharide and
zinc salt into potato PRS3
starch milk, mixing and treating, reacting with
leucine-
glycine dipeptide to obtain composite modified potato PRS3
starch; pre-gelatinizing the composite modified potato PRS3
starch, mixing with milk, mixing, homogenizing, sterilizing, inoculating and fermenting, and post-
ripening to prepare set yogurt. 2+ The
chitosan oligosaccharide-Zn 2+ and
leucine-
glycine dipeptide composite modified potato PRS3 starch forms a reversible three-dimensional
coordination network and hydrophobic interaction, significantly improves transparency, freeze-thaw stability and resistance
retention rate, and enhances the adsorption and combination capacity of
milk protein and
milk fat. The set yogurt has good
gel strength, texture characteristics and sensory quality, effectively promotes the proliferation of probiotics, improves the coagulation efficiency, prevents whey separation and promotes the synthesis of intestinal short-chain fatty acids, and improves intestinal health.