LAUSR

BACKGROUND The gastrointestinal (GI) tract is a major site of lipid oxidation, and the lipid oxidation products are related to an increased risk of various chronic diseases. In this study, the inhibition capacity of bound-polyphenol rich insoluble dietary fiber (BP-IDF) from highland barley to lipid oxidation was evaluated during simulated GI digestion. RESULTS We found that the level of lipid hydroperoxides (LOOH) and aldehydes were significantly inhibited when highland barley BP-IDF (HBBP-IDF) co-digestion with cooked pork. The lipid oxidation products were more effectively scavenged during simulated gastric digestion, with inhibition of 77.4% for LOOH, 52.3% for malondialdehyde, 46.5% for 4-hydroxy-2-hexenal and 48.7% for 4-hydroxy-2-nonenel, respectively. The fiber-bound polyphenols are the principal scavengers of lipid oxidation products. CONCLUSION These findings suggest that HBBP-IDF could be use as functional ingredients able to scavenge lipid oxidation products across the GI tract. This article is protected by copyright. All rights reserved.