How do You Know if Your Food is Genetically Modified?
At least for now...the small stickers on fruit and vegetables contain different PLU codes depending on whether the produce was conventionally grown, organically grown or genetically engineered. The PLU code for conventionally grown produce consists of four numbers, organically grown produce five numbers prefaced by the number 9, and GM produce five numbers prefaced by the number 8.
Conventionally grown PLU: 1022
Organically grown PLU: 91022
Genetically modified PLU: 81022