Monsanto Tested Roundup Using 'Dumb' Assumptions: Expert

By Dorothy Atkins (April 11, 2019, 10:39 PM EDT) -- A toxicologist hired by a couple alleging Monsanto's Roundup caused their cancers said repeatedly during a California jury trial Thursday that the Bayer AG unit made "dumb" assumptions when it tested the weedkiller's safety, and he warned attorneys to put on gloves before handling an open Roundup bottle.

During trial in Oakland, California, toxicologist William Sawyer said that Monsanto had not conducted any long-term animal studies on its Roundup mixture and that one of its genotoxicity studies was conducted "under the dumb assumption" that glyphosate was the only toxicological substance in its Roundup formula.

"The heart of this is that Roundup...

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