Four Corners States Biomonitoring Collaborative: Leveraging lab capacity toward regional health concerns |

By Kim Krisberg

2,4-Dichlorophenoxyacetic acid—otherwise known as 2,4-D—is the active ingredient in a variety of weed killers and one of the most common, widely used herbicides in the world. Studies in lab animals have found that high doses of 2,4-D are associated with negative health effects. Research on human exposure is more of a mixed bag.

According to the Agency for Toxic Substances and Disease Registry, it doesn’t appear that contact with small amounts of 2,4-D is harmful to people. Some studies on workers with relatively high exposure rates, such as professional herbicide applicators, have identified a possible link to cancers …read more