Within three weeks, 25 of the 45 rats (55.6%) from the GM soy group died compared to only 3 of 33 (9%) from the non-GM soy group and 3 of 44 (6.8%) from the non-soy controls.
The FDA does not require any safety tests on genetically modified foods.[...] The rationale for this hands-off position is a sentence in the FDA’s 1992 policy that states, “The agency is not aware of any information showing that foods derived by these new methods differ from other foods in any meaningful or uniform way.”  The statement, it turns out, was deceptive. Documents made public from a lawsuit years later revealed that the FDA’s own experts agreed that GM foods are different and might lead to hard-to-detect allergens, toxins, new diseases or nutritional problems. They had urged their superiors to require long-term safety studies, but were ignored. The person in charge of FDA policy was, conveniently, Monsanto’s former attorney (and later their vice president).
There have been less than 20 published, peer-reviewed animal feeding safety studies and no human clinical trials—in spite of the fact that millions of people eat GM soy, corn, cotton, or canola daily. There are no adequate tests on “biochemistry, immunology, tissue pathology, gut function, liver function and kidney function,”  and animal feeding studies are too short to adequately test for cancer, reproductive problems, or effects in the next generation.
Just soy you know, Monsanto is not only the creator of the pesticide Roundup, they're also the patent-holder on a soybean that's resistant to it. That means they can sell you their seeds, to be planted in fields which can then be doused with their chemicals, whereupon the beans will survive to be harvested and made into everything you, your pets, and your meat animals consume everyday, complete with the chemicals from the pesticide! Ain't science grand!
I'm reminded of a line from Judge Dredd: "Eat recycled food! It's good for the environment... and it's not bad for you!"
Oh, but it is, kiddies. And it's not just for tofu-eaters anymore. Check your labels. I challenge you to find a condiment, chocolate bar, or loaf of bread in your supermarket that doesn't contain either soy lecithin or soybean oil. Go on. Try it. I'll wait.
Oh, and in case you're interested? Monsanto has as many enemies as Wal-Mart. Even if only half of what they've been blamed for is accurate, that's some scary shit they're getting away with.
Now I'm reminded of a line from Jurassic Park: "You guys were so eager to find out if you could do it, you didn't stop to wonder if you should."