2,4-D Exposure and risk assessment: Comparison of external dose and biomonitoring based approaches

► Biomonitoring-based exposure assessments provide valuable insights. ► Lots of biomonitoring and external dose exposure data exists for 2,4-D. ► Internal and external dose based risk assessments are conducted for 2,4-D. ► Internal dose based risk assessment for 2,4-D yields lower hazard. ► Significant margins of safety (HQ values less than 0.1) exist for 2,4-D.