Nikki Weathers holds popcorn kernels grown on her farm near Yuma. Colorado State University researchers estimate that nine out of 10 corn kernels grown in Colorado are genetically modified. Starting next year, genetically modified foods must be labeled. (Austin Humphreys, Special to The Colorado Sun)

GMO food labels are coming. But with most products already using modified ingredients, battle lines have shifted.

Food safety advocates still fight for tougher labeling rules, but Colorado farmers feel like they're on a public education campaign of their own

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