Abstract
Brewers’ spent grain (BSG) is the major by-product of the brewing industry, with great potential as a functional ingredient due to its bioactive compounds. Thus, BSG could be suitable for improving the low nutritional quality of wheat-based snacks highly consumed by young people. The objective of this study was to substitute wheat flour with BSG (0, 10, 20, and 30%) for cookies elaboration, and evaluate the dough rheology, phenolic acids, antioxidant capacity, arabinoxylans content and proximate composition of the cookies Protein content and bioactive compounds (ferulic and p-coumaric acids, water unextractable arabinoxylans) of cookies significantly (p < 0.05) increased with the substitution level. In comparison to the wheat-alone cookies, the 20% BSG-containing cookies showed a lower hydrolysis and glycemic index (GI), and less total starch. The low cost, protein-rich BSG with antioxidant capacity improves the nutritional quality of cookies and may confer health benefits beyond basic nutrition.
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Abbreviations
- ABTS:
-
2,2′-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid)
- AX:
-
Arabinoxylans
- BSG:
-
Brewers´ Spent Grain
- BU:
-
Brabender Units
- DS:
-
Digestible Starch
- DPPH:
-
2,2′-diphenyl-1-picrylhydrazyl
- GI:
-
Glycemic Index
- HI:
-
Hydrolysis Index
- RS:
-
Resistant Starch
- TS:
-
Total Starch
- WEAX:
-
Water Extractable Arabinoxylans
- WUAX:
-
Water Unextractable Arabinoxylans
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Acknowledgements
The authors gratefully acknowledge María Teresa Zúñiga Ramos, Maribel Yael Valencia Tapia, Yésica Martínez Nuñez, as well as Cervecería Cuauhtémoc-Moctezuma, S. A. de C.V., Navojoa, Sonora, México.
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Heredia-Sandoval, N.G., Granados-Nevárez, M., Calderón de la Barca, A.M. et al. Phenolic Acids, Antioxidant Capacity, and Estimated Glycemic Index of Cookies Added with Brewer’s Spent Grain. Plant Foods Hum Nutr 75, 41–47 (2020). https://doi.org/10.1007/s11130-019-00783-1
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DOI: https://doi.org/10.1007/s11130-019-00783-1