Back in 2015, the organization IARC assembled a working group to review a number of compounds including 2,4-D. They voted to classify 2,4-D a ‘2B – Possible’ carcinogen, the same ranking they have given to, among other things, coffee, pickles, and being a hairdresser. The panel concluded, “there is inadequate evidence in humans for the carcinogenicity of 2,4-D” because “epidemiological studies did not find strong or consistent increases in risk of NHL or other cancers in relation to 2,4-D exposure.”