Effects of endogenous non-starch components on the starch digestibility of breadfruit flour based on extrusion
Yutong Zhang1, Mingsen Wang2, Chem Mouylin3
1Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences, National Center of Important Tropical Crops Engineering and Technology Research, Key Laboratory of Processing Suitability and Quality Control of the Special Tropical Crops of Hainan Province, Wanning 571533; Chinese Academy of Tropical Agricultural Sciences, Haikou 570105, Hainan, China; Sanya Research Institute, Chinese Academy of Tropical Agriculture Sciences, National Key Laboratory for Tropical Crop Breeding, Sanya 572025, Hainan, China; College of Food Science, Northeast Agricultural University, Harbin 150030, China.
Abstract:
Breadfruit is valuable with starch content exceeding 80% (db), and reducing its starch digestibility is key for developing low-glycemic foods. This study investigated the effects of endogenous lipids, proteins, pectins on starch digestibility of breadfruit flour (BF) via extrusion. Before extrusion, resistant starch (RS) content of untreated BF was 25.28%. After defatting, deproteinization, depectinization, it decreased to 24.47%, 22.31%, 20.69%, respectively. Pectin removal caused significant starch structural changes, confirming it as the main factor affecting starch digestibility. After extrusion, RS content increased significantly to 34.37-42.62%, with lipids becoming the dominant factor regulating starch digestibility. The multi-scale structural parameters of extruded defatted sample (V-type, relative crystallinity 6.47%, long-chain proportion 36.87%) showed the most significant changes, consistent with starch digestibility trends. Extrusion combined with endogenous non-starch component removal altered component structure by promoting V-type starch-lipid complex formation and stabilizing chain length distribution. This study provides theoretical basis for developing low-glycemic breadfruit-based foods.
Related Concept Videos
Bioavailability Enhancement: Drug Stability Enhancement and GI Retention
Carbohydrate Digestion


