In March 2015, the World Health Organization’s International Agency for Research on Cancer (IARC) gathered seventeen of the world’s top cancer researchers to evaluate glyphosate, a primary component of the popular weed-killer, Roundup. The seventeen member workgroup was led by Dr. Aaron Blair, a recently retired epidemiologist from the U.S. National Cancer Institute.
Over a year-long period, the workgroup reviewed nearly 1,000 peer-reviewed and published scientific studies. Based on the results of these studies, IARC unanimously classified glyphosate as a Group 2A chemical, “probably carcinogenic to humans.” This categorization is given when there is limited evidence of carcinogenicity in humans and sufficient evidence of carcinogenicity in experimental animals. Of the nearly 1,000 chemicals reviewed by IARC to determine the carcinogenic effect, fewer than 100 have received this designation.
The studies reviewed by IARC discussed glyphosate exposure and its connection to various serious health effects. They linked glyphosate exposure to non-Hodgkin lymphoma, various other types of cancer, kidney disease, heart disease, Parkinson’s, Alzheimer’s, and chronic respiratory illness. Studies further supported a connection between glyphosate exposure and attention deficit disorder, autism, birth defects and reproductive issues, even infertility.