UPDATE: Veggie burger rumors are flying! Some readers and other news organizations have alleged that the study I wrote  about on Monday was funded by the pro-meat, anti-soy group the Weston A. Price Foundation . But this morning, I spoke with Cornucopia Institute  director Mark Kastel, who said that the Weston A. Price Foundation did not contribute any funding to the "Behind the Bean" (pdf ) study. More here .
On Monday, I wrote  about a recent study by the Cornucopia Institute  that found that many popular veggie burgers are made with hexane, an EPA-registered air pollutant and a neurotoxin. Commenters had lots of interesting discussions and good questions, many of which require far more knowledge of the subject than I have to answer. So I called up Charlotte Vallaeys, the lead researcher on the Cornucopia Institute's soy study "Behind the Bean," (pdf ) to talk about some of the issues readers have raised.