Rios L.Y., Gonthier M.P., Remesy C., Mila I., Lapierre C., Lazarus S.A., Williamson G., Scalbert A. (2003) Chocolate intake increases urinary excretion of polyphenol-derived phenolic acids in healthy human subjects. Am J Clin Nutr 77:912-8 PubMed (12663291)

Urine analysed after enzymatic deconjugation

Excretion in Urine (nmol/g creatinine)
Number Dose Multiple Dose Duration Time (hours) Metabolite
0 24 48
1 80 g Single Dose 2943 974 887
Hippuric acid
2 80 g Single Dose 54.2 33.7 41.2
4-Hydroxybenzoic acid
3 80 g Single Dose 71.1 63.6 90.5
4-Hydroxyhippuric acid
4 80 g Single Dose 70.1 30.5 36.8
Phenylacetic acid
5 80 g Single Dose 3.1 2.6 2.4
Dihydrocaffeic acid
G+creatinine)&chxp=1,50|3,50&chd=t:0.0,24.0,48.0|2943.0,974.0,887.0|0.0,24.0,48.0|54.2,33.7,41.2|0.0,24.0,48.0|71.1,63.6,90.5|0.0,24.0,48.0|70.1,30.5,36.8|0.0,24.0,48.0|3.1,2.6,2