Quercetin derivatives are deconjugated and converted to hydroxphenylacetic acids but not methylated by human fecal flora in vitro

Aura A. M. , O'Leary K. A. , Williamson G. A. , Ojala M. , Bailey M. , Puuponen-Pimia R. , Nuutila A. M. , Oksman-Caldentey K. M. , Poutanen K.. (2002)

Journal of Agricultural and Food Chemistry, 50, 1725-1730