Genetically modified (GM) food is controversial because it is impossible to prove a negative.
The public has many worries about GM food.
There is broad scientific consensus that GM foods pose no greater risk to human health than conventional food does. But a new GM food might do so …
There hasn't been time to prove or disprove this.
This is a real concern.
Nothing proved yet, but …
Most studies show no or negligible transfer of genes into the blood of humans. But it might happen …
It hasn't happened yet, but it might …