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Updated: Jul 10, 2026

High-throughput, Microscale Protocol for the Analysis of Processing Parameters and Nutritional Qualities in Maize (Zea mays L.)
Published on: June 16, 2018
Distinct interaction patterns between corn and potato starch with polyphenols drive the reduction of starch
Xinyi Deng1, Qile Zhang1, N G Wang Hin1
1Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, 999077, Hong Kong, China.
Abstract:
Polyphenols' addition can reduce starch digestibility; however, the interaction patterns between starches and polyphenols of varying molecular structures, and their impact on starch digestion and absorption remain unclear. In this study, corn and potato starches were complexed with four representative polyphenols, with complexing index values of 2.8-8.3%. Results showed that corn starch formed V-type inclusion complexes with polyphenols and physically inhibited digestion. Whereas potato starch formed non-inclusion complexes, resulting in easier polyphenols release during digestion and reduced digestive enzymes activities. A slowly digestible starch fraction was formed in both starch types between polyphenols and amylopectin chains (DP 15-18). Meanwhile, a resistant starch fraction was mainly formed from inclusion complexes in corn starch and retrograded amylose in potato starch (DP ∼80). These starch-polyphenol complexes further decreased glucose absorption by 12-29% through downregulating SGLT1 and GLUT2 transporter expression. These findings demonstrate that starch-polyphenol interactions differentially modulate digestibility and glucose uptake, offering strategies for designing low-glycemic functional foods.
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