Urine Plasma  
Polyphenol metabolite Composition of the [polyphenol] source Doses
administered
Dose
duration
Total no. subjects Mean urinary excretion (%) Kinetic data Tmax (hours) Mean Cmax (µmol/L) Half life (hours) AUC (µmol/L·h) Kinetic data Reference
human studies
Kaempferol Food administered
1 tablet Single dose 5 WATSON 1999
Quercetin Food administered
1 tablet Single dose 5 5.6 ng/mL after 6 hours WATSON 1999