GMO foods are genetically engineered or genetically modified foods. This is done in the laboratory by inserting foreign genes into the DNA of our food sources, whether they be animal or plant food sources.
Once altered in this way, the resulting foods are called "Genetically Modified Organisms". Personally, I'd like to think I'm eating food, not something that sounds like science fiction.
The sources for genes that can be inserted into the DNA of the things that we grow to eat, whether it be animal or crop, can include genes taken from insects, other animals, viruses, humans and bacteria. The idea is to alter the crop or animal to make it grow better, last longer, produce more, resist diseases, resist things that are in the soil that man has put their like certain pesticides, and you'll discover more as you read on.
Since it is not required to label foods that are genetically altered, education is necessary. In reality, it is hard to avoid ALL genetically altered food, but you can do the best you can to find foods that are GMO free, and I hope to help by providing you with information below.