Effects of Roasting Treatment on the Composition, Digestive Properties, and Antioxidant Activities of Free and Bound Phenolic in Black Tartary Buckwheat Husks.

J Food Sci

Food Microbiology Key Laboratory of Sichuan Province, Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, College of Food and Bioengineering, Xihua University, Chengdu, China.

Published: June 2025


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Article Abstract

The black tartary buckwheat husk (BTBH), a processing by-product, is rich in nutrients and bioactive compounds. This study investigated the effects of roasting treatment on the composition, digestion, and antioxidant properties of free and bound phenolics in BTBH. The roasting treatment enhanced the extractability of free and bound phenolics by disrupting the grain matrix. Following roasting treatment, the phenolic content of BTBH increased significantly (p < 0.05), with increments of 8.61 mg GAE/g for free phenols and 20.88 mg GAE/g for bound phenols. Furthermore, HPLC-Q-Exactive Plus Orbitrap HRMS was employed to characterize the free and bound phenolic compounds in BTBH of roasting, revealing 22 phenolics and 3 non-phenolic compounds, with flavonoids being the major phenolic compounds in BTBH. After the roasting treatment, the content of all six phenolic compounds, except for rutin, showed a significant increase. During in vitro digestion, roasting treatment is more favorable for increasing the content of phenolic compounds and enhancing their antioxidant capacity. This research highlights the potential of roasted treatment to increase phenolic content and improve the bioactivity of BTBH.

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http://dx.doi.org/10.1111/1750-3841.70313DOI Listing

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