FDA currently does not have a realiable way to assess the food and products safety containing genetically modified organisms (GMOs). GMOs are now found in more than 80% of (non-organic) foods sold in conventional grocery stores in the U.S.  This study published in the International Journal of Biological Sciences, states:

The biological plausibility of a subchronic or chronic side effect of the GM diet, linked to the new toxin in the mammalian regimen, or due to the mutagenesis effect of the genetic modification itself, is thus non negligible. Finally it should be stressed that statistically significant effects of GM diets, or of residues of pesticides that are contained by GMOs, have also been observed in other instances [21-25], but not in all studies [26, 27] enlightening the necessity of a case-by-case approach, and that the real toxicological studies are quite limited up to date for that [28]. All these observations taken together in our opinions do not allow a clear statement of toxic effects, but to suggest them as such, because they are clearly undeniable.

In English that means there are certainly more risks and indication of caution than previous claims of a Monsanto-supported expert panel about a GMO.  The research, conducted by scientists from France, Italy, New Zealand, U.K. and U.S., corroborates the decade-long criticism by public interest organizations.  This is an important step, wish it would have been done before GMO’s flooded the US market.  But this is another case that supports buying organic produce because currently certified organic can not be a GMO.