Tofu Conventional tofu typically comes from genetically modified soybeans sprayed directly with glyphosate weedkiller.

Some studies show that modified soybeans produced six to seven percent less yield per acre than conventional soybeans.

Betting on a quick approval, Monsanto sold the seeds, and farmers planted a million acres of the genetically modified soybeans in 2016.

But Brazil can't import most genetically modified soybeans, which means it can't easily turn to the U.S. to fulfill its soybean importing needs.

A Romanian farmer shows genetically modified soybeans in the village of Varasti, 130km southeast of Bucharest, in this May 21, 2004 file photo.

A Romanian farmer shows genetically modified soybeans in the village of Varasti (130km southeast of Bucharest) in this May 21, 2004 file picture.