Physicochemical properties and bioaccessibility of phenolic compounds of dietary fibre concentrates from vegetable by-products

View/ Open
Issue date
2022Suggested citation
Vaz, Ana A.;
Odriozola Serrano, Isabel;
Oms Oliu, Gemma;
Martín Belloso, Olga;
.
(2022)
.
Physicochemical properties and bioaccessibility of phenolic compounds of dietary fibre concentrates from vegetable by-products.
Foods, 2022, vol. 11, núm.17, p.1-15.
https://doi.org/10.3390/foods11172578.
Metadata
Show full item recordAbstract
The agro-food industry generates a large volume of by-products, whose revaluation is
essential for the circular economy. From these by-products, dietary fibre concentrates (DFCs) can
be obtained. Therefore, the objective of this study was to characterise (a) the proximal composition
by analysing soluble, insoluble and total Dietary Fibre (DF), (b) the physicochemical properties,
and (c) the phenolic profile of artichoke, red pepper, carrot, and cucumber DFCs. In addition, the
bioaccessibility of phenolic compounds was also evaluated after in vitro gastrointestinal and colonic
digestions. The results showed that the DFCs had more than 30 g/100 g dw. The water holding and
retention capacity of the DFCs ranges from 9.4 to 18.7 g of water/g. Artichoke DFC presented high
concentration of phenolic compounds (8340.7 mg/kg) compared to the red pepper (304.4 mg/kg),
carrot (217.4 mg/kg) and cucumber DFCs (195.7 mg/kg). During in vitro gastrointestinal digestion,
soluble phenolic compounds were released from the food matrix, chlorogenic acid, the principal
compound in artichoke and carrot DFCs, and hesperetin-7-rutinoside in red pepper cucumber DFCs.
Total phenolic content decreased after in vitro colonic digestion hence the chemical transformation of
the phenolic compounds by gut microbiota. Based on the results, DFCs could be good functional
ingredients to develop DF-enriched food, reducing food waste.
Is part of
Foods, 2022, vol. 11, núm.17, p.1-15European research projects
The following license files are associated with this item: