This study elucidated the mechanisms involved in the impact of Tsamba (a highland barley product) starch digestibility by different thermal treatments. The results demonstrate that different thermal processing methods (microwave, roasting, sand frying, frying, baking, and steaming) significantly alter the polyphenol content of highland barley, which in turn affects its ability to inhibit α-amylase activity. SEM, CLSM, XRD and FTIR were used to evaluate the effects on starch microstructure and digestibility. The microstructure, short-range order, and crystalline structure of starch would modify after different thermal treatments. Notably, the starch structure with the least disruption and improvement in resistance to enzyme hydrolysis suggests that microwaves may be an effective way to produce foods with higher resistant starch content. This study provides valuable insights into dietary strategies for the management of starch digestibility in people with diabetes.
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| http://dx.doi.org/10.1016/j.foodchem.2025.143054 | DOI Listing |
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