Transparency's picture
I’ve read Glyphosate was first patented as a chelator in 1964 by Stauffer Chemical Co. It was patented by Monsanto and introduced as an herbicide in 1974. According to Dr. Huber, an award-winning scientist and professor emeritus of plant pathology at Purdue University for the past 35 years, “It’s important to realize that glyphosate is not ‘just’ an herbicide. It was first patented as a *mineral chelator*. It immobilizes nutrients, so they’re not physiologically available for your body.” He says Glyphosate is also patented as an antibiotic: “When you take the good bacteria out, then the bad bacteria fill that void, because there aren’t any voids in nature. We have all of these gut-related problems, whether it’s autism, leaky gut, C. difficile diarrhea, gluten intolerance, or any of the other problems. All of these diseases are an expression of disruption of that intestinal microflora that keeps you healthy.” So my question is, how can you in good conscience, promote Glyphosate which has been patented as both a mineral chelator and an antibiotic…both of which have enormous implications?

A:Expert Answer


Dr. Huber’s assertions have been addressed previously, and I’d refer you to this response ( on GMO Answers, by Marian Bleeke, as well as this blog post (, written by organic farmer Rob Wallbridge.


Regarding your question, it is true that glyphosate is a chelator and that it has some antimicrobial properties. However, it is important when looking at an effect of any compound to understand the whole story. For instance, red blood cells bind oxygen. That’s an indisputable fact. So to say that blood prevents muscle cells of the body from gaining access to oxygen would be obviously faulty logic and would be based on looking at only half of the story. To extend the analogy, oxygen is also a potent antimicrobial compound for many good anaerobic gut organisms. That doesn’t mean that small amounts of oxygen in the gut will kill all of the organisms in the gut. Obviously, just the label “antimicrobial” is not very informative without more information.


In the glyphosate example that you cite, it appears that there is also a jump in logic that looks at only half of the story. In 2012, Dr. Stephen Duke et al. wrote a comprehensive review of glyphosate in which they explain that there are many natural chelators in soil, and that they are beneficial for facilitating transport of minerals into plants: Moreover, to suggest that glyphosate as an antimicrobial preferentially affects good bacteria implies that all “good” and “bad” microbes can be defined by their metabolism, and there is no basis for this conclusion.


In risk assessment, hazard and exposure (dose) need to be considered for each organism. In 2013, the German BfR did a reevaluation of glyphosate, and, based on accusations about glyphosate affecting animal gut microbes, it commissioned a study to look at effects of glyphosate in an artificial rumen microbial system. As we’ve discussed previously on this site, ruminants rely on the microbes (bacteria, fungi, protozoa) in the rumen to predigest their feed before any other digestion occurs in the lower parts of their gastrointestinal tract. The BfR concluded that “no adverse effects on animal health are to be anticipated.” Likewise, animals have been fed glyphosate in long-term studies, and histological examination of gut tissues has not revealed any pathologies like you describe. Furthermore, these in vitro results are consistent with what has been observed with billions of animals fed diets containing ingredients derived from biotech crops.


Dr. Van Eenennaam published in 2013 that “large numbers of livestock in many countries have been consuming GE feed for over a decade. For example, in 2011 alone approximately 9 billion broiler chickens, weighing over 22.5 billion kg liveweight were produced in the United States. During that year 30 million tonnes of corn and 13.6 million tonnes of soy were used as broiler and breeder poultry feed of which 88% and 94%, respectively, was likely from GE crops. Production parameters, mortality and condemnation rates for the more than 105 billion broilers that have been processed in the US since 2000 are shown in Figure 2. In 2000 approximately 25% of corn and 50% of soy grown in the US was GE and hence poultry diets have likely contained an ever increasing proportion of GE feed from 2000 to 2011. This very large field data set does not reveal overt health problems associated with the consumption of GE feed, but rather shows a continuation of industry trends that were observed prior to the introduction of GE crops (Figure 2).” This link will allow you to see the figure and read the paper:

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Dale's picture

You really haven't answered the question. You've just thrown a bunch of red herrings into your answer. The real point is this: Does glyphosate chelate minerals such as magnesium, molybdenum, and others beneficial to humans in such a way that persons eating a plant sprayed with glyphosate will no longer be able to absorb or digest those minerals? It's facile to say that we've fed GMOs to chickens for 10 years and everything is fine. The individual chickens don't live ten years. They don't even live a year. The question is: What's happening to humans who have been eating glyphosate-laden plants and chickens for 10 years. That's quite a different issue and you haven't addressed it.