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Advisor(s)
Abstract(s)
Olive pomace is a semisolid by-product with a great potential as a source of bioactive compounds.
Using its soluble fraction, a liquid-enriched powder (LOPP) was obtained, exhibiting a rich
composition in sugars, polyphenols and minerals, with potential antioxidant, antihypertensive and
antidiabetic health benefits. To validate LOPP potential as a functional ingredient the effect of the
gastrointestinal tract on its bioactive composition and bioactivities was examined. Polyphenols and
minerals were the most affected compounds, however, a significant bioaccessibility of potassium and
hydroxytyrosol was verified (> 57 %). As a consequence, the LOPP bioactivities were only moderately
affected (losses around 50%). For example, 57.82 ± 1.27 % of the recovered antioxidant activity by
ORAC was serum - available. From an initial a-glucosidase inhibition activity of 87.11 ± 1.04 %, at
least 50% of the initial potential was kept (43.82 ± 1.14 %). Regarding initial ACE inhibitory activity (91.98 ± 3.24 %), after gastrointestinal tract losses, significant antihypertensive activity was retained in the serum-available fraction (43.4 ± 3.65 %). The colon-available fraction also exhibited an abundant composition in phenolics and minerals. LOPP showed to be a potential functional ingredient not only with potential benefits in preventing cardiovascular diseases but also in gut health.
Description
Keywords
Bioeconomy In vitro digestion Minerals Polyphenols Antioxidant Antihypertensive 28 Antidiabetic Bioaccessibility index
Citation
Ribeiro, T.B., Oliveira, A., Campos, D., Nunes, J., Vicente, A.A., Pintado, M. (2020). Simulated digestion of olive pomace water-soluble ingredient: Relationship between the compounds bioaccessibility and their potential health benefits. Food & Function
Publisher
Royal Society of Chemistry