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Cited by 472

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Human metabolism of dietary flavonoids: Identification of plasma metabolites of quercetin

Day, Andrea J., Mellon, Fred, Barron, Denis, Sarrazin, Géraldine, Morgan, Michael R.A., Williamson, Gary·2001·Free Radical Research

Abstract

The position of conjugation of the flavonoid quercetin dramatically affects biological activity in vitro, therefore it is important to determine the exact nature of the plasma metabolites. In the present study, we have used various methods (HPLC with diode array detection, LCMS, chemical and enzymic synthesis of authentic conjugates and specific enzymic hydrolysis) to show that quercetin glucosides are not present in plasma of human subjects 1.5 h after consumption of onions (a rich source of flavonoid glucosides). All four individuals had similar qualitative profiles of metabolites. The major circulating compounds in the plasma after 1.5 h are identified as quercetin-3-glucuronide, 3'-methylquercetin-3-glucuronide and quercetin-3'-sulfate. The existence of substitutions in the B and/or C ring of plasma quercetin metabolites suggests that these conjugates will each have very different biological activities.

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Metadata

Authors
Day, A. J., Mellon, F., Barron, D., Sarrazin, G., Morgan, M. R. A., & Williamson, G.
Venue
Free Radical Research
Published
2001-01
Volume
35
Issue
6
Pages
941-952
ISSN
  • 1029-2470 (ISSN-L)
  • 1071-5762
OpenAlex
W2168918080
Cited by
472
References
1
FWCI
9.52
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Human metabolism of dietary flavonoids: Identification of plasma metabolites of quercetin. https://app.cochat.ai/papers/10.1080/10715760100301441
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Day, A. J., Mellon, F., Barron, D., Sarrazin, G., Morgan, M. R. A., & Williamson, G. (2001). Human metabolism of dietary flavonoids: Identification of plasma metabolites of quercetin. Free Radical Research. https://doi.org/10.1080/10715760100301441

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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