TY - JOUR
T1 - Study of olive pomace antioxidant dietary fibre powder throughout gastrointestinal tract as multisource of phenolics, fatty acids and dietary fibre
AU - Ribeiro, Tânia B.
AU - Campos, Débora
AU - Oliveira, Ana
AU - Nunes, João
AU - Vicente, António A.
AU - Pintado, Manuela
N1 - Funding Information:
Tânia B. Ribeiro thanks the Fundação para a Ciência e Tecnologia (FCT), Portugal and Association BLC3 – Technology and Innovation Campus, Centre Bio R&D Unit for the PhD Grant SFRH/BDE/108271/2015. This work was supported by the project “Biological tools for adding and defending value in key agro-food chains (bio – n2 – value)”, n° NORTE-01-0145-FEDER-000030, funded by Fundo Europeu de Desenvolvimento Regional (FEDER) and TransfereEmpreende, n° NORTE-02-0651-FEDER-000081 under Programa Operacional Regional do Norte - Norte2020. We would also like to thank the scientific collaboration of the project UID/Multi/50016/2019 and local olive pomace producers from Trás-os-Montes region of Portugal.
Funding Information:
Tânia B. Ribeiro thanks the Fundação para a Ciência e Tecnologia (FCT), Portugal and Association BLC3 – Technology and Innovation Campus, Centre Bio R&D Unit for the PhD Grant SFRH/BDE/108271/2015. This work was supported by the project “Biological tools for adding and defending value in key agro-food chains (bio – n2 – value)”, n° NORTE-01-0145-FEDER-000030, funded by Fundo Europeu de Desenvolvimento Regional (FEDER) and TransfereEmpreende, n° NORTE-02-0651-FEDER-000081 under Programa Operacional Regional do Norte - Norte2020. We would also like to thank the scientific collaboration of the project UID/Multi/50016/2019 and local olive pomace producers from Trás-os-Montes region of Portugal.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/4
Y1 - 2021/4
N2 - Pulp-enriched powder (POPP) was obtained from olive pomace solid fraction, a derived from the new value chain established for olive by-products. As a multifunctional powder, POPP retains several bioactive compounds (fatty acids, dietary fibre and phenolics) under potential synergic interaction, even more, reactive throughout the digestion. So, in this study, the potential multifunctionality of POPP was evaluated after the gastrointestinal tract. A significant loss of phenolics occurred during oral digestion (62.48%). However, the potential role of dietary fibre as phenolics’ carrier and its possible liberation in the stomach allowed recovering a significant amount of phenolics (77.11%) and a bioaccessibility index of at least 50% (mainly for tyrosol and its glucoside). POPP also provides high content of dietary fibre mainly insoluble fibre (69.68 g/100 g dry weight) linked to a substantial amount of bound phenolics (7.63 mg of gallic acid equivalents/g fibre dry weight), with a positive effect on the fatty acids bioaccessibility [decreased the saturated (5–6%) and facilitated the unsaturated fatty acids bioaccessibility (4–11%)]. PCA analysis became evident the negative effect of simulated gastrointestinal digestion upon POPP as mainly linked to phenolics’ loss. Despite all negative effects of the simulated digestion on POPP bioactive composition, phenolics and unsaturated fatty acids showed to be bioaccessible in significant amount, and the amount of bound phenolics associated to fibre retained in the colon have the potential to exert gut health benefits.
AB - Pulp-enriched powder (POPP) was obtained from olive pomace solid fraction, a derived from the new value chain established for olive by-products. As a multifunctional powder, POPP retains several bioactive compounds (fatty acids, dietary fibre and phenolics) under potential synergic interaction, even more, reactive throughout the digestion. So, in this study, the potential multifunctionality of POPP was evaluated after the gastrointestinal tract. A significant loss of phenolics occurred during oral digestion (62.48%). However, the potential role of dietary fibre as phenolics’ carrier and its possible liberation in the stomach allowed recovering a significant amount of phenolics (77.11%) and a bioaccessibility index of at least 50% (mainly for tyrosol and its glucoside). POPP also provides high content of dietary fibre mainly insoluble fibre (69.68 g/100 g dry weight) linked to a substantial amount of bound phenolics (7.63 mg of gallic acid equivalents/g fibre dry weight), with a positive effect on the fatty acids bioaccessibility [decreased the saturated (5–6%) and facilitated the unsaturated fatty acids bioaccessibility (4–11%)]. PCA analysis became evident the negative effect of simulated gastrointestinal digestion upon POPP as mainly linked to phenolics’ loss. Despite all negative effects of the simulated digestion on POPP bioactive composition, phenolics and unsaturated fatty acids showed to be bioaccessible in significant amount, and the amount of bound phenolics associated to fibre retained in the colon have the potential to exert gut health benefits.
KW - Antioxidant dietary fibre
KW - In vitro digestion
KW - Multifunctional powder
KW - Olive pomace
UR - http://www.scopus.com/inward/record.url?scp=85100479421&partnerID=8YFLogxK
U2 - 10.1016/j.foodres.2020.110032
DO - 10.1016/j.foodres.2020.110032
M3 - Article
C2 - 33773651
AN - SCOPUS:85100479421
SN - 0963-9969
VL - 142
JO - Food research international
JF - Food research international
M1 - 110032
ER -