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.