Glyphosate, N-phosphonomethyl-glycine is inevitably related with genetically modified plants. Steven Drucker, an attorney who sued FDA regarding that topic, published a book in 2015: Altered Genes, Twisted Truth: How the Venture to Genetically Engineer Our Food Has Subverted Science, Corrupted Government, and Systematically Deceived the Public.
Certain gut bacteria are capable of degrading Glyphosate into glycine, the neurotransmitter. Not only glyphosate was patented as an antibiotic, it also chelates metals, it inhibits one of the most essential plants and bacterial enzymes, EPSP, which delivers aromatic amino acids for us, which we can't produce. JBPC 2015 (V. 15, p.121-159) article from Samsel and Seneff, states under FOIA, that Monsanto knew about glyphosate carcinogenicity since ~1983, long before saturating fields with GMO's which bind that carcinogen. Scientists knew in 1950'ies, that certain cancers thrive with glycine. It is as if, people do not read any more.