Keep in mind that there have been residue standards for a long time now.
Prior to RR crops, the standards only had to account for glyphosate
residues from drift, rather than from direct applications. These same
crops however, also had residue tolerances for those herbicides actually
being used for their production.

However, there has been no scientific testing to determine the effect
of a 200 times increase in Roundup residue on human health...

regards
Marcus