Glyphosate (Monsanto’s Roundup) is a broad-spectrum systemic herbicide used to kill weeds, especially annual broadleaf weeds and grasses that are known to compete with commercial crops grown around the world. It has several advantages over many herbicides in that it breaks down in the soil into non-toxic organic molecules, reducing or eliminating contamination of groundwater and lower soils.
Monsanto has developed genetically modified (GMO) grains that are resistant to glyphosate, so that agriculture can apply the herbicide to kill the competitive weeds while not harming the crop. This allows farmers to suppress the weeds while allowing better production out of the grain crop.
Whatever the benefits of glyphosate, GMOs and the herbicide are tied together in many minds. And there has been an ongoing effort by many people to claim that glyphosate causes cancer. But let’s look at the science, because maybe we’ll get some information.
What’s this about cancer?
The famous (or is that infamous?) study from Séralini, which claimed that glyphosate and GMO corn caused cancer in rats, is quite popular with the anti-GMO forces. For many reasons, including bad statistics, improper experimental design, and bad conclusions, the article was retracted by the journal.
Because that article was retracted, it doesn’t actually count because it really doesn’t exist (but to be fair, it was eventually, re-published in a very low ranked journal). This story is frighteningly similar to the story of that cunning fraud, Mr. Andy Wakefield, who wrote a fraudulent, and ultimately retracted, article about vaccines and autism. I guess Séralini is the Wakefield of the GMO world.
There are better studies out there–maybe.
There is an ideological subculture that is motivated to blame all the perceived ills of the world on environmental factors and corporate/government malfeasance. Often this serves a deeper ideological drive, which can be anti-vaccine, extreme environmentalism, or anti-GMO. The latest environmental bogeyman making the rounds is glyphosate, which is being blamed for (you guessed it) autism.
Glyphosate is the active ingredient in the herbicide Roundup. It has been widely used for about 40 years, and with the introduction of GM crops that are Roundup resistant, its use has increased significantly in the last 20 years. It has therefore become a popular target for anti-GMO fearmongering.
Glyphosate is one of the least toxic herbicides used. It inhibits the enzyme 5-enolpyruvylshikimic acid-3-phosphate synthase which interferes with the shikimic pathway in plants, resulting in the accumulation of shikimic acid in plant tissues and ultimately plant death. The enzyme and pathway do not exist in animals, which is why toxicity is so low. Still, chemicals can have multiple effects and so toxicity needs to be directly measured and its epidemiology studied.
Experimental evidence has shown that neither glyphosate nor AMPA bioaccumulates in any animal tissue. No significant toxicity occurred in acute, subchronic, and chronic studies.
Therefore, it is concluded that the use of Roundup herbicide does not result in adverse effects on development, reproduction, or endocrine systems in humans and other mammals. For purposes of risk assessment, no-observed-adverse-effect levels (NOAELs) were identified for all subchronic, chronic, developmental, and reproduction studies with glyphosate, AMPA, and POEA.
As pesticides go, glyphosate has very low toxicity, and any dose a person is likely to get exposed to is well below the safety limits.
Myles reviews part of Gary Null’s 2012 anti-GMO documentary Seeds of Death: Unveiling the Lies of GMOs
The following transcript via mylespower.co.uk
I recently sat down and watched the 2012 anti-GMO documentary “Seeds of Death: Unveiling the Lies of GMOs“. The documentary was written, produced and published by Gary Null (an alternative medicine promoter who was once almost killed from one of his own supplements) and claims to expose the dangers of genetically modified foods. It consisted of interviews from apparently “leading” scientists, physicians, professors, attorneys. Most of which, for some unknown reason, are shot in front of a green screen with rather boring backdrops added in post-production.
Like nearly all other anti-GMO documentaries, it’s full of the same scientifically inaccurate statements that we have seen a thousand times before; Roundup ready crops produce Roundup, the bT endotoxins are harmful to humans and GM-food has been shown to produce tumours in rats. All of these ideas can be disproven by a quick Google search or by reading the source material. The documentary also included some familiar faces, like Gilles-Éric Séralini, the lead author of the highly discredited “long term toxicity of Roundup” paper and Mike Adams, a man who believes that the nerve agent sarin is used in water fluorination. However, unlike other anti-GMO documentaries I’ve watched in the past, this one turns up the anti-SCIENCE to eleven.
By far one of the more hilarious, stupid and demonstrably incorrect comments in the documentary came from a Dr Rima Laibow, MD. According to her website she is a graduate from Albert Einstein College of Medicine and for the past 35 years has been promoting drug-free, natural medicine. However, after reading some of the outrageous and potentially dangerous claims on her website (like “nano-sliver will stop HIV), I question if she even has a basic medicine or science qualification. It also seems that she is aware of her own bullshit, as her website comes with a disclaimer saying that none of the advice given is intended to “diagnose, prescribe for, treat or claim to cure, mitigate or prevent disease conditions”.
Also See Snopes.
Bad science in the paper ‘Long term toxicity of a Roundup herbicide and a Roundup-tolerant GM maize’
Long term toxicity of a Roundup herbicide and a Roundup-tolerant genetically modiﬁed maize
Spontaneous Tumours in Sprague-Dawley Rats and Swiss Mice