Bioactive compounds from blueberry and blackcurrant powder alter the physicochemical and hypoglycaemic properties of oat bran paste
2021
Abstract Cereal foods supplemented with fruit ingredients have attracted the attention of consumers due to their bioactive compounds which confer health promoting effects. In this study, oat bran was mixed with 0%, 10%, 15% and 25% (w/w) of blueberry or blackcurrant powder, to form blueberry and blackcurrant enriched oat bran pastes. Pasting properties, colour profiles, and nutritional compositions of these pastes were evaluated. The bioactive compounds in the extracts of pastes were identified. An in vitro digestion procedure was employed to observe the effects of bioactive compounds on predicted glycaemic response of pastes. Delphinidin, cyanidin, petunidin, and malvidin were identified in extracts of 25% blueberry and blackcurrant powder-enriched pastes. Results showed that enrichment with blueberry or blackcurrant powder significantly altered the pasting viscosities and the colour profiles, and increased the content of phenolic compounds (in particular the phenolic acids and the anthocyanins) of pastes (p
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