It's a canadian plant--I wonder what regulations they have.
"Aminopterin is a folic acid antagonist used as an antineoplastic in the 50s and 60s. This agent is also used to produce abortion in women in the early 1950s ..."
Now used as a cancer drug. Our local news said this is what was on the wheat from China.
The truth is, sometimes disparities occur in ingredients that go undetected until something like this takes place. Then new procedures are put in place...until the next unlikely event takes place. But rat poison should be controllable, that's a standard.