A Review and Update with Perspective of Evidence that the Herbicide Glyphosate (Roundup) is a Cause of Non-Hodgkin Lymphoma.
Level 5 - mechanism / opinion, no new human data
Narrative review and perspective synthesizing epidemiological, animal, and mechanistic studies.
PubMed 34052177 · doi:10.1016/j.clml.2021.04.009
What was done
The author reviewed literature published up to and after the 2015 IARC classification regarding the link between glyphosate-based formulations and non-Hodgkin lymphoma (NHL). The synthesis integrated epidemiologic research, animal carcinogenicity studies, in vitro and in vivo human lymphocyte genotoxicity assays, and proposed mechanisms, applying the Bradford Hill criteria to assess causation.
What was found
The abstract reports no quantitative effect estimates, sample sizes, or statistical figures. Qualitatively, it reports that epidemiologic studies demonstrate an association between glyphosate formulations and NHL risk, rodent studies demonstrate carcinogenicity (specifically NHL in mice), and mechanistic studies show low-dose genotoxicity in human lymphocytes. Additionally, it highlights a novel biological mechanism: the upregulation of activation-induced cytidine deaminase, a B-cell genome mutator enzyme.
Why it matters
The paper synthesizes diverse lines of toxicological and epidemiological evidence to argue that glyphosate causally induces NHL, advocating for regulatory agencies to reassess their safety classifications.
Limits
As a narrative review and perspective piece, it lacks formal systematic review methodology, structured search criteria, and quantitative meta-analytic pooling. The abstract provides no specific study counts, effect sizes, exposure thresholds, or formal risk-of-bias evaluations for the cited literature.
Cited by
- supports Exposure to the herbicide glyphosate is associated with an increased risk of cancer, specifically non-Hodgkin's lymphoma.