Here are some ways to avoid genetically modified foods:
Read the PLU labels. If the five digit PLU number starts with “8,” the food is either genetically modified or genetically engineered. If the five digit PLU number starts with “9,” it
’s organic. Also, by watching for the absence of either the 8 or 9, which means the produce is neither organically grown or genetically modified, you can recognize traditionally grown produce. Ensure your produce is not genetically modified by reading the number on the sticker, and by buying 100% certified organic.100% certified organic food is by law never genetically modified!
A 4-digit number indicates the food was conventionally grown and may or may not be genetically modified.
A 5-digit number beginning with an 8 is a genetically modified food. However, not all GM foods can be identified because PLU labeling is optional.
A 5-digit number beginning with a 9 indicates it is organic, and thus a non-GM food.
(*Sourced from http://blogs.webmd.com/health-ehome/2011/03/how-can-you-avoid-genetically-modified-food.html)