The Guardian: Weedkiller products more toxic than their active ingredient, tests show

According to a Guardian story published just today, government researchers in the US have found evidence that “some popular weedkilling products, like Monsanto’s widely-used Roundup, are potentially more toxic to human cells than their active ingredient is by itself.”1(My emphasis.)

“The tests are part of the US National Toxicology Program’s (NTP) first-ever examination of herbicide formulations made with the active ingredient glyphosate, but that also include other chemicals. While regulators have previously required extensive testing of glyphosate in isolation, government scientists have not fully examined the toxicity of the more complex products sold to consumers, farmers and others.”1

Even though Monsanto introduced glyphosate-based Roundup in 1974 and even though doctors and scientists have had issues with it for years, only now, after more than 40 years of widespread use, is the government investigating the toxicity of “glyphosate-based herbicides”1 on human cells.

The EPA requested the NTP tests after the IARC’s (International Agency for Research on Cancer) 2015 classification of glyphosate as probably carcinogenic. (At that time the IARC also highlighted their concerns about formulations that combine glyphosate with other ingredients to enhance weed killing effectiveness.)


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