This does not surprise me, giving the sharp rise in food allergies related to corn and/or corn products such as high-fructose corn syrup. Some members of a population will always be more sensitive to a new hazard -- and someone allergic to a food will tend to avoid it, and thus any negative effects it causes.
Monsanto responded by claiming that the study was based on "faulty analytical methods." They seem to use that as a synonym for "unprofitably throrough."
By an extremely circuitous route, I have to wonder if edible clay would help. You can still buy that in central and South America where some poisonous varieties of potato remain popular as food. The clay absorbs the toxins. I wonder if people who are eating that clay to make their potatoes safe might also be protected from some of the other toxic things that get into the food supply.