The world authority on cancer, the International Agency for Research on Cancer (IARC) of the World Health Organization (WHO) declared the herbicide glyphosate ‘probably carcinogenic to humans’ in its latest expert assessment.
A Working Group of 17 experts from 11 countries met at IARC headquarters 3-10 March 2015 in Lyon, France. The meeting followed almost a year of review and preparation, including a comprehensive review of the latest available scientific evidence. The experts were selected on the basis of their expertise and most importantly, the absence of real or apparent conflicts of interest.
The Working Group considered “reports that have been published or accepted for publication in the openly available scientific literature” as well as “data from governmental reports that are publicly available”. They evaluated five organophosphate insecticides and herbicides including glyphosate. The results, announced 20 March were as follows. The herbicide glyphosate and the insecticides malathion and diazinon were classified as probably carcinogenic to humans (category 2A). The insecticides tetrachlorvinphos and parathion were classified as possibly carcinogenic to humans (category 2B). The summary can be found here.