RT info:eu-repo/semantics/article T1 Physico-chemical and nutritional properties of breadfruit pulp and peel flours: Insights into starch molecular characteristics and their impact on starch digestibility A1 Calix Rivera, Caleb Samir A1 Neves, Grazielle Nathia A1 Mauro, Raúl Ricardo A1 Villanueva Barrero, Marina A1 Ronda Balbás, María Felicidad K1 Breadfruit flour K1 Flow field-flow fractionation K1 MALS detection K1 Thermal properties K1 In vitro starch digestibility K1 31 Ciencias Agrarias AB Breadfruit is an underutilized crop with significant nutritional potential as a gluten-free starch-rich food ingredient. This study evaluated the chemical, molecular, structural, and nutritional properties of breadfruit (BF) flours derived from both pulp and peel, along with banana flour as a reference. Starch digestibility, estimated in vitro, was linked to these properties. Both BF flours showed high starch and fiber contents, with low amylose levels. Flow Field-Flow Fractionation-MALS-dRI analysis revealed similar amylopectin molecular weights (MW = 1.04–1.15·108g/mol) and root mean square radius (rrms = 172–174 nm) in both BF flours, which were lower than those of banana flour (MW = 1.73·108 g/mol; rrms = 187 nm). Scanning electron micrographs revealed that BF starch granules were smaller (3–15 μm) and rougher compared to those found in the banana sample (15–50 μm). X-ray diffraction showed a B-type crystalline pattern in BF samples. Fourier-transform infrared spectroscopy showed a higher ordered crystallinity of starch and a significantly higher amount of disordered structures in the Amide I region in BF flours compared to banana. BF flours also exhibited higher gelatinization temperatures with a narrower range, indicating increased granular thermostability and amylopectin crystallite homogeneity. Peel flour contained high levels of polyphenols and minerals. The lower amylopectin molecular weight and size, smaller starch granules and lower amylose content of BF flours compared to banana flour could explain the higher starch-digestion-rate-index (SDRI) of their uncooked samples. Cooked BF flours, however, showed an SDRI 10 % lower than banana, suggesting a reduced glycemic index after gelatinization. This study provides valuable insights into BF flours composition, molecular and structural properties, and their relationship with digestibility. These findings are relevant for developing novel gluten-free foods. Further research is needed to assess the starch digestibility of real food products made with BF flours and to investigate their functional properties and technological performance. PB Elsevier SN 0141-8130 YR 2025 FD 2025 LK https://uvadoc.uva.es/handle/10324/76717 UL https://uvadoc.uva.es/handle/10324/76717 LA eng NO International Journal of Biological Macromolecules, 2025, vol. 305, p. 141224 NO Producción Científica DS UVaDOC RD 04-ago-2025