What do you know about GMOs?

October is National Non-GMO Month, so it’s a good time to ask yourself how much you really know about what exactly GMOs are, why they’re produced, and how prevalent they are?

On that last point, most eaters remain in the dark, because the U.S. and Canada — unlike Japan, Australia, and the European Union — don’t require GMOs to be labeled as such, even though 80% of packaged foods in this country contain genetically engineered ingredients. We’re bringing you this primer courtesy of Grist and Nature’s Path (an organic producer of grain-based food).