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
1,3,5-Trimethoxybenzene Not applicable 200 mg Single dose 12 Graph LOKE 2009
3-O-Methylgallic acid Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
3-Phenylpropionic acid Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
4-Ethylbenzoic acid Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
4-Ethylphenol Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
4-O-Methylgallic acid Not applicable 200 mg Single dose 12 Graph LOKE 2009
Benzoic acid Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
Dihydro-p-coumaric acid Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
Dihydrocaffeic acid Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
Ferulic acid Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
Gallic acid Not applicable 200 mg Single dose 12 Graph LOKE 2009
Isorhamnetin Not applicable 0.5 mg/kg bw Single dose 2 Detected (unquantified) MENG 2004
Methoxyphenylacetic acid Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
Protocatechuic acid Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
Quercetin Not applicable 0.5 mg/kg bw Single dose 2 7.6 Graph Trace amount MENG 2004
200 mg Single dose 12 Graph Graph LOKE 2009
3 capsules/day Single dose 10 0.31 MOON 2008
Vanillic acid Not applicable 200 mg Single dose 12 Graph Graph LOKE 2009
(+)-Catechin Not applicable 25 mg Single dose 10 Graph Graph SOLEAS 2001
rat studies
Quercetin Not applicable 1 % of diet 28 days 12 1.5 ┬Ámol/L after 28 days KAWAI 2009
  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
Quercetin Not applicable 20 mg/100 g diet Single dose 12 0.03 ┬Ámol/L after 21 days SANTOS 2008
3 capsules/day Single dose 10 1.18 3 0.05 3.47 62.5 Graph MOON 2008
(+)-Catechin Not applicable 25 mg Single dose 10 Graph Graph SOLEAS 2001