Journal
FOOD CHEMISTRY
Volume 243, Issue -, Pages 345-350Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.09.138
Keywords
Diabetes mellitus; Health products; Tea polyphenols; Starches; Inhibition
Funding
- Zhejiang province agricultural projects of public benefit technology research [2016C32034]
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The importance of postprandial hyperglycemia in the treatment of diabetes has been recognized recently. Tea products, such as tea polyphenols (TP), epigallocatechin gallate (EGCG), matcha, and instant tea, were chosen as constituents of tea-flour food, aimed at regulating the release of glucose from starchy foods in the postprandial period. Six starches were chosen for internal composition analysis and hydrolysis studies in vitro. Corn starch, wheat starch, and lily root flour appeared to have higher resistant starch content, slower digestion profiles, and lower kinetic constants, implying sustained release of glucose in the gastrointestinal tract. The effect of tea products on starch digestion was determined in order to get a desired formulation of dietary product for patients with hyperglycemia. Compared with macha and instant tea, TP and EGCG exerted greater inhibition of amylase and amyloglucosidase, especially for corn starch with 0.5% TP or 0.5% EGCG.
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