Antioxidative Properties of Functional Polyphenols and Their Metabolites Assessed by an ORAC Assay

Hidekazu ISHIMOTO; Akihiro TAI; Morio YOSHIMURA; Yoshiaki AMAKURA; Takashi YOSHIDA; Tsutomu HATANO; Hideyuki ITO

doi:10.1271/bbb.110717

This article has now been updated. Please use the final version.

Antioxidative Properties of Functional Polyphenols and Their Metabolites Assessed by an ORAC Assay

Hidekazu ISHIMOTO, Akihiro TAI, Morio YOSHIMURA, Yoshiaki AMAKURA, Takashi YOSHIDA, Tsutomu HATANO, Hideyuki ITO

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Keywords: polyphenol, metabolite, antioxidative activity, oxygen radical absorbance capacity (ORAC), AAPH

JOURNAL FREE ACCESS Advance online publication

Article ID: 110717

DOI https://doi.org/10.1271/bbb.110717

The final version of this article is now available: Vol. 76 (2012) , No. 2 p.395

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Abstract

We compared the antioxidative activities of polyphenol metabolites with those of intact functional polyphenols by an assay of the oxygen radical absorbance capacity (ORAC). The metabolites of ellagitannin geraniin, chlorogenic acid, and (−)-epigallocatechin gallate displayed more potent antioxidative activity than their respective original compounds. Our findings suggest that these metabolites may play important roles as biological antioxidants after their consumption.

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