GMO stands for Genetically Modified Organism. It is when science alters an organism, such as a plant, on a genetic level at the DNA structure itself for purposes of eliciting a desired trait. In altering the DNA it is not possible for it to be known if there are other things that change within the organism that may render it harmful in some way to another species to which it had not been known to be harmful to.
Commercially grown genetically modified foods were first introduced on the market to consumers in the 1990’s after the FDA, in 1992, declared them as “not inherently dangerous.” Crops, including soy, wheat, corn and many other grains and non-grains, were originally genetically engineered for “good” reasons including possessing traits such as being pest and virus resistant, to tolerate herbicides and pesticides, to exist and thrive in harsh environments, to have longer shelf lives and even to be more nutritionally healthy. What started as a noble cause, however, has resulted in devastating effects on human beings.
At the time of this writing, labeling of genetically modified organism products is required in 64 countries, but not required in the United States. Read more HERE on this site about GMO versus Non-GMO, the controversy and the harm it can cause to human beings.