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  • Title: Bioaccessibility and antioxidant activity of free phenolic compounds and oligosaccharides from corn (Zea mays L.) and common bean (Phaseolus vulgaris L.) chips during in vitro gastrointestinal digestion and simulated colonic fermentation.
    Author: Luzardo-Ocampo I, Campos-Vega R, Gaytán-Martínez M, Preciado-Ortiz R, Mendoza S, Loarca-Piña G.
    Journal: Food Res Int; 2017 Oct; 100(Pt 1):304-311. PubMed ID: 28873692.
    Abstract:
    Corn (Zea mays L.) and common beans (Phaseolus vulgaris L.) are alternative suitable ingredients for snacks, because of their content of bioactive compounds such as phenolic compounds (PC) and oligosaccharides (OS). However, there is no information about the transformation of these compounds associated with food matrix during gastrointestinal digestion. Therefore, the objective of this work was to simulate the whole digestion process (mouth to colon) to estimate bioaccessibility and small intestine permeability of free PC and OS, and the antioxidant capacity of free PC. Digested nixtamalized corn-cooked common bean chips exhibited significant different quantities of free PC and OS, and higher antioxidant activity compared to methanolic extract. The free PC showed high values of apparent permeability coefficients (0.023-0.729×10-3), related with their absorption in the small intestine. Both free PC and OS were retained in the non-digestible fraction of chips (10.24-64.4%) and were able to reach the colon. Our results suggest the digestion potential to increase chip bioactive compounds and antioxidant activity. Additional studies are required to evaluate their in vivo effects.
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