Is there any evidence that Soya Lecithin contains phytoestrogens?

"3.3. Estrogenic activity of soy lecithin

Regarding chocolate and infant formula samples, results suggested that soy lecithin might be a source of estrogenic activity in foodstuff. To follow up this hypothesis, we analyzed extracts of two soy lecithin granulates available as food supplement. Extracts of both lecithin samples induced a potent estrogenic response in the YES (Yeast Estrogen Screen) (189 ± 21.5 ng EEQ/kg, see Table S5)."

"4.7. Contribution of soy lecithin

[..]

Taken together, this data suggests that soy lecithin contributes considerably to the estrogenicity of foodstuff. To further investigate this hypothesis, we extracted pure soy lecithin and detected potent estrogenicity in both available products. As lecithin production does not typically include cleanup steps to remove isoflavones from crude soy beans (van Nieuwenhuyzen and Tomas, 2008), we assumed a high phytoestrogen content. However, we did not detect quantifiable concentrations of genistein in soy lecithin extracts. In accordance with this, genistein is not detectable in products containing soy lecithin. Since no additional analytical data is available we conclude that a so-far unidentified estrogen-like compound is present in soy lecithin. Whether this chemical is of soy origin or is a contamination during production remains to be answered."
Source: http://www.sciencedirect.com/science/article/pii/S0…