http://www.google.com/url?q=http%3A%2F%2Fcen.acs.org%2Farticles%2F91%2Fweb%2F2013%2F02%2FGut-Bacteria-Liberate-Hidden-Toxins.html&sa=D&sntz=1&usg=AFQjCNF6s4vsq4IRKx04mP1U6c6YDqHbMA
Hope this link works. Sorry if it doesnt.
Good article about the problems with wheat, corn (a grain, NOT a vegetable) and peanuts (ditto). Tree nuts are fine.
Cheers