Glyphosate, an herbicide that remains the world's most ubiquitous weed killer, raises the cancer risk of those exposed to it by 41%, a new analysis says. Researchers from the University of Washington evaluated existing studies into the chemical " found in weed killers including Monsanto's popular Roundup " and concluded that it significantly increases the risk of non-Hodgkin lymphoma (NHL), a cancer of the immune system. "All of the meta-analyses conducted to date, including our own, consistently report the same key finding: exposure to GBHs (glyphosate-based herbicides) are associated with an increased risk of NHL," the authors wrote in a study published in the journal Mutation Research. In 2015 ... the World Health Organization's International Agency for Research on Cancer classified glyphosate as "probably carcinogenic to humans." Moreover, the chemical has triggered multiple lawsuits from people who believe that exposure to the herbicide caused their non-Hodgkin's lymphoma. In 2017 ... more than 800 people were suing Monsanto; by the following year, that figure was in the thousands. The authors of the University of Washington report analyzed all published studies on the impact of glyphosate on humans. Co-author ... Rachel Shaffer said: "This research provides the most up-to-date analysis of glyphosate and its link with Non-Hodgkin Lymphoma, incorporating a 2018 study of more than 54,000 people who work as licensed pesticide applicators." The scientists also assessed studies on animals.