Guy P.A., Renouf M., Barron D., Cavin C., Dionisi F., Kochhar S., Rezzi S., Williamson G., Steiling H. (2009) Quantitative analysis of plasma caffeic and ferulic acid equivalents by liquid chromatography tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 877:3965-74 PubMed (19879819)

Compound Mean content
Chlorogenic acid, total 225 µg/g