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Profiling of phenolic metabolites in feces from menopausal women after long-term isoflavone supplementation

AuthorsGuadamuro, Lucía ; Jiménez-Girón, Ana ; Delgado, Susana ; Flórez García, Ana Belén ; Suárez, Adolfo; Martín-Álvarez, Pedro J. ; Bartolomé, Begoña ; Moreno-Arribas, M. Victoria ; Mayo Pérez, Baltasar
Gut microbiota
Fecal phenolic metabolites
Issue Date2016
PublisherAmerican Chemical Society
CitationJournal of Agricultural and Food Chemistry 64(1): 210-216 (2016)
AbstractPhenolic compounds were screened by UPLC-ESI-MS/MS in the feces of 15 menopausal women before and after long-term isoflavone treatment. In total, 44 compounds were detected. Large intertreatment, interindividual, and intersample variations were observed in terms of the number of compounds and their concentration. Four compounds, the aglycones daidzein and genistein and the daidzein derivatives dihydrodaidzein and O-desmethylangolensin, were associated with isoflavone metabolism; these were identified only after the isoflavone treatment. In addition, 4-ethylcatechol, 3-hydroxyphenylacetic acid, and 3-phenylpropionic acid differed significantly in pre- and postintervention samples, whereas the concentration of 4-hydroxy-5-phenylvaleric acid showed a trend toward increasing over the treatment. The phenolic profiles of equol-producing and -non-producing groups were similar, with the exceptions of 3-hydroxyphenylacetic acid and 3-phenylpropionic acid, which showed higher concentrations in equol-non-producing women. These findings may help to trace isoflavone-derived metabolites in feces during isoflavone interventions and to design new studies to address their biological effects.
Identifiersdoi: 10.1021/acs.jafc.5b05102
issn: 0021-8561
e-issn: 1520-5118
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