Rowland I.R., Wiseman H., Sanders T.A., Adlercreutz H., Bowey E.A. (2000) Interindividual variation in metabolism of soy isoflavones and lignans: influence of habitual diet on equol production by the gut microflora. Nutr Cancer 36:27-32 PubMed (10798213)

Compound Mean content
Daidzein 21.2 mg/burger
Genistein 34.8 mg/burger