Glyphosate does not cause cancer (so far as we know)

Derek Lowe – Glyphosate and Cancer:

I went into one of those in detail here, and after looking into the case that it makes, I am willing to dismiss out of hand anything else Seneff has to say on the subject. It’s that bad. You will hear that “MIT researchers” have “proven” that glyphosate does X and Y and Z, and that this work is “published in peer-reviewed journals”, but nothing like that is true. Seneff has done no actual studies on glyphosate; she doesn’t work in a lab. Those papers are rehashes of stuff from the literature, piles of speculation and dot-connecting, and they’re invariably published in low-quality pay-to-play journals that do little or no actual refereeing of their contents. And their content is yet another problem – as shown in that link above, the paper that goes on and on about glyphosate’s effect on gut bacteria does not manage to cite any of the papers that have studied. . .glyphosate effects on bacteria. It not only doesn’t cite them, it seems to pretend that this research does not even exist, probably because all these papers contradict the fundamental ideas that Seneff’s tower of speculation is built on. She’s going around now saying that half of all children are going to be autistic (because of glyphosate), and that it’s also a root cause of not only cancer, but Alzheimer’s and a whole list of other diseases. If your knowledge of glyphosate’s toxicology comes only from reading the Seneff papers, I feel pity for you, because you have a lot of work ahead of you if you want to actually understand anything about it.


In considering the risk of cancer due to glyphosate, he compares it to the recent articles on bacon/cured meats and risks of cancer:

…that’s basically what happened recently with the IARC and its announcement on bacon being a cause of cancer. Under real-world conditions, eating a normal amount of bacon raise your risk of colorectal cancer by an amount too small to consider. But it does appear to be raising it by a reproducible, measurable amount, and therefore bacon (and other processed meats) are in the IARC’s category 1

And the conclusion:

So that’s the state of the art: there is, from what I can see, nothing very clearly linking glyphosate to human cancer. There’s certainly room for more evidence to come in, though, and it looks like we’re going to need it, because this is a topic that’s never going to go away until we have more data.

Glyphosate – carcinogenic or not?

Kate Kelland at the Globe and Mail – To spray or not to spray: Is your weed killer carcinogenic?:

In March 2015, an IARC monograph concluded that glyphosate is “probably carcinogenic.” Yet seven months later the European Food Safety Authority (EFSA), an independent agency funded by the EU, published a different assessment, saying glyphosate is “unlikely to pose a carcinogenic hazard to humans.”

It sucks when politics and ideals gets in the way of science. I don’t know who is right, but we need to get this sorted out. There’s also two issues I see with the use of this product – the risk to human health, and the risk to the environment. For example, bee colony collapse disorder (CCD) has been linked to glyphosates, but I’m not sure if the findings are definitive.