Anyways, whether we like it or not, there are already genetically modified foods in our supermarkets and likely in our cupboards. What are GMO foods? GMO stands for Genetically Modified Organisms. They are made by forcing genes from one species of life (ie animals, bacteria, etc) into the DNA of a food crop or another animal in order to introduce a new trait to the host. In other words, its mixing genes between different life forms. So you could be getting pig genes within the DNA of your carrots.
And the reasons you want to avoid GMO foods is because "The American Academy of Environmental Medicine reported that 'Several animal studies indicate serious health risks associated with GM food' including infertility, immune problems, accelerated aging, faulty insulin regulation, and changes in major organs and the gastrointestinal system."
If you aren't yet sure how to shop and avoid these foods, here's a link for a guide to help you become informed and make wise choices with your dollars spent.
Non-GMO Shopping Guide.
The #1 foods to avoid are soy, corn, canola and cottonseed, followed by Hawaiian papaya, and some zucchini and yellow squash. But be aware that even if the animals themselves are not GMO's, the food that they are fed might be.