Ito H., Gonthier M.P., Manach C., Morand C., Mennen L., Remesy C., Scalbert A. (2005) Polyphenol levels in human urine after intake of six different polyphenol-rich beverages. Br J Nutr 94:500-9 PubMed (16197573)

Compound Mean content
(+)-Epicatechin 6.6 mg/g dry weight
(+)-Catechin 2.8 mg/g dry weight
02 mers 4.2 mg/g dry weight
03 mers 3.6 mg/g dry weight
04 mers 3.3 mg/g dry weight