Roundup Weedkillers Caused Multiple Cancers in Rats

There’s now more evidence that glyphosate exposure at levels deemed safe by regulatory authorities can cause multiple kinds of cancer, thanks to a new peer-reviewed study published Tuesday in Environmental Health.

The study authors, including researchers from the Ramazzini Institute in Italy and Boston College, examined the impact of glyphosate and two common glyphosate-based weedkiller formulations — Roundup Bioflow, which is used in Europe, and Ranger Pro, a generic version of Roundup used in the U.S.

Both formulations are sold by Bayer, which acquired the Roundup brand and related weedkillers in 2018 when it bought Monsanto.