The National Science Foundation concludes that genetically modified foods are not particularly dangerous, nor particularly important for our food supply.

It is clear that the widely grown GMO foods generally do not hurt the people who eat them. If they did, medical records would show it.

That doesn't mean they don't hurt wildlife. The widespread use of Roundup, generally with GMO food crops, has done a lot of harm to milkweed and to monarch butterflies. However, each kind of modification is a separate different issue as regards environmental harm.

So far, we don't see instances in which a certain crop has several quite different alternative forms of genetic modification. If that starts to happen, consumers might want labels to indicate which genetic modifications are used in a given food.