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Nutritional, antioxidant, and glycaemic characteristics of new functional bread

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Abstract

New wheat-rye bread fortified with cereal dietary fibre, β-glucan hydrogel, and sourdough starter culture was designed in this study. The impact of these additives on nutritional composition and antioxidant properties was investigated. Functional bread with extruded wheat bran (10.0 %), cereal β-glucan hydrogel (12.5 %), and lactobacilli starter culture was compared with traditional wheat-rye bread (control). The contents of basic nutrients (protein, fat, etc.), dietary fibre, biologically active compounds (polyphenols and flavonoids), qualitative and quantitative analysis of simple saccharides and phenolic acids (by HPLC) were analysed in both bread types. Antioxidant activity, measured by two spectrophotometric methods (2,2′-azinobis-(3-ethylbenzthiazoline-6-sulphonic acid); ABTS and di(phenyl)-(2,4,6-trinitrophenyl)iminoazanium (2,2-diphenyl-1-picrylhydrasyl); DPPH, was also evaluated. The effect of the addition of the above ingredients, as compared with traditionally prepared bread, was examined in the postprandial study, in which glucose and insulin levels were determined. In comparison with the control bread, higher amounts of dietary fibre, flavonoid content, and antioxidant activity were attained in the designed bread. Consumption of the designed bread led to reduced glucose levels in healthy males (n = 10) 120 min after the ingestion of the functional bread compared with the control (p < 0.048). No statistically significant change in the insulin response in the volunteers was observed after consumption of the designed bread compared with the control.

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Correspondence to Lucia Mikušová.

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Mikušová, L., Gereková, P., Kocková, M. et al. Nutritional, antioxidant, and glycaemic characteristics of new functional bread. Chem. Pap. 67, 284–291 (2013). https://doi.org/10.2478/s11696-012-0258-8

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  • DOI: https://doi.org/10.2478/s11696-012-0258-8

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