Ames test

The deliberate and malicious ignorance of the anti-GMO movement must be resoundingly defeated, with its lies tossed into the dustbin of history.
In the 1970s, an assay was developed by Dr. Bruce Ames that revolutionized the ability to test if a compound causes cancer or not. Since then, the Ames test has been used on everything from food dyes to pesticides. The test's power is not only that it is incredibly efficacious, but also that it's inexpensive and relatively easy to do.