As of right now, Vermont is the only state to have mandated labeling of genetically modified foods, but they have been met with extreme opposition from companies like Monsanto and Kraft Foods who are heavily invested in GMOs.
While genetically modified foods in general may cause some issues, there are not really many major cases caused specifically by genetically modified foods that have caused everyone to reevaluate the existence of genetically modified foods, other than the health of everyone as a whole.
Genetically modified foods actually help stimulate the economy.
The production of genetically modified foods interferes the production of organic foods in a way that jeopardizes the organic status.
Genetically modified foods typically last longer and can be produced in greater abundance and in a smaller amount of time than organic foods and allow for a greater food supply around the world.
While many problems seem to arise from the concept of genetically modified foods, including health related issues, environmental issues, and economic competition for opposing food companies, those who are most affected, as well as those who can make the most difference do not prioritize the issue, so it must not be as big of issue as some make it seem.
All levels of government and agencies and departments within seem to have very little authority over the practice of genetically modifying foods and crops.
This reduces the necessity of exposing genetically modified crops to harmful pesticides and insecticides, making these foods free from chemicals and environment friendly as well.
Even the American Cancer Society (who you would expect to be the first to protest if a link to cancer was found), says "There is no proof at this time that the genetically modified foods that are now on the market are harmful to human health or that they would either increase or decrease cancer risk because of the added genes" (you can find the quote on their website under common questions).
In fact, there isn't even one case of a confirmed illness caused by genetically modified foods - although admittedly, it may be a difficult link to show.
The genetically modified organisms pros and cons need to be studied properly before carrying out the process of altering the genetic constitution of any living being.
Local, state, and the federal governments have not taken their authority to govern and regulate the practice of genetically modifying foods and crops to its full potential.
Genetically modified foods have changed the food consumer market and agriculture as a whole and have proved to be a tough competitor for organic and natural foods.
Scientists and genetic engineers create unnatural foods and crops with a good purpose, but some of the outcomes are not what were intended.
Many consumers want to know when something they are consuming has been genetically modified and in addition they should be able to know what exactly has been modified or added, while many others are either ignorant of the modified foods or simply just do not care.
A specific occurrence in which consumers were harmed by a genetically modified food was when a toxin present during growth of a crop to serve as a pesticide and keep other organisms from harming the crop were found in the blood of pregnant women and some of their unborn babies, along with the blood of not pregnant women.
Genetically modified foods are a part of the many science and technological advances that have allowed for a greater food supply for the growing population of the world, as well as contributed to the needs of many people to store their food supply for long periods at a time for convenience.