Moors S., Blaszkewicz M., Bolt H.M., Degen G.H. (2007) Simultaneous determination of daidzein, equol, genistein and bisphenol A in human urine by a fast and simple method using SPE and GC-MS. Mol Nutr Food Res 51:787-98 PubMed (17579895)

Compound Mean content
Daidzein 12.9 mg/50 g
Genistein 25.2 mg/50 g