evidence: How it is damaging: In addition to the negative impact it has on methylation, glyphosate causes oxidative stress and neurotoxicity, which means it adversely affects the nervous system. Studies have linked glyphosate to neurological conditions such as dementia and autism.1,4,5 It is also a potential carcinogen. A 2017 review of the research did not lead the European Union to ban Glyphosate, although the International Agency for Research on Cancer did find it to be a cancer-causing substance.2,3