Gyphosate increases carcinogenic Aflatoxin. Potential hazard in food supply.

aflatoxinsIn another study that documents the catastrophic environmental disaster caused by , researchers revealed that glyphosate causes an increase in the concentration of aflatoxin produced by Aspergillus section Flavi strains.

is produced by Co., and is the company’s main herbicide product.

Aflatoxin contamination of crops is a worldwide concern and the U.S. crop market has been severely affected by contaminated crops. Aflatoxins refer to a group of four mycotoxins (B1, B2, G1 and G2) produced primarily by two closely related fungi, Aspergillus flavus
and Aspergillus parasiticus. Strains of A. flavus show a great variation in their ability to produce aflatoxins.

Aflatoxins are carcinogenic and their quantity in food and feed is closely monitored and regulated in most countries. The Food and Drug Administration (FDA) guidelines specify that certain types of feed can contain an aflatoxin concentration of up to 300 parts per billion. Human foods must contain less than 20 ppb, while the threshold for milk is even lower, at 0.5 ppb. Export U.S. corn must test at less than 20 ppb.

Cows that eat tainted corn can pass on aflatoxin through their milk, placing the consumer at risk for health problems and pets are also affected as demonstrated by the pet food recall in February this year of five product lines of privately branded due to elevated levels of aflatoxin in the corn used to make the pet food. The recall originated from Hy-Vee Inc a in Kansas.

The latest study originating from Argentina found that glyphosate significantly increased the production and growth rate of aflatoxin by all Aspergillus strains tested.


Barberis , Carranza CS, Chiacchiera SM, Magnoli CE.Influence of herbicide glyphosate on growth and aflatoxin B1 production by Aspergillus section Flavi strains isolated from soil on in vitro assay.J Environ Sci Health B. 2013;48(12):1070-9. doi: 10.1080/03601234.2013.824223.

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    Writers for the Food Exposed blog

    One thought on “Gyphosate increases carcinogenic Aflatoxin. Potential hazard in food supply.

    • October 6, 2013 at 9:14 pm

      Glyphosate is an herbicide, which means it kills plants. It does not kill fungus. In fact, very high amounts can stimulate the growth of some fungi. However, it’s use on crops will not cause dangerous amounts of aflatoxin.


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