Characteristics of Polyphenols of Black Hulless Barley Bran and Its Anti-Diabetic Activity

Polyphenols play a crucial role in promoting human health. This study aims to investi- gate the polyphenols of black hulless barley bran (HBP) and evaluate their anti-diabetic mechanisms in vivo. Using UPLC-QTOF-MS/MS, 27 compounds were identified in HBP, including four phenolic acids, 14 flavonoids, and nine anthocyanidins. High contents of Chrysoeriol 7-O-glucuronide (42.09 mg/g), Cyanidin 3-O-glucoside (21.02 mg/g), and Cyanidin 3-O-(6′′-O-malonyl)-glucoside (24.45 mg/g) were quantified via...