Kawai Y., Saito S., Nishikawa T., Ishisaka A., Murota K., Terao J. (2009) Different profiles of quercetin metabolites in rat plasma: comparison of two administration methods. Biosci Biotechnol Biochem 73:517-23 PubMed (19270373)

Compound Mean content
Quercetin, total 32.9 mg/100 g fresh weight