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
Narirutin 104.8 mg/L
Naringin 384.7 mg/L
Hesperidin 14.3 mg/L