Dioxins, a collective term for a group of environmental contaminants that includes certain dioxin, furan, and dioxin-like PCB (polychlorinated biphenyl) congeners, are found throughout the world. Dioxins and furans are released into the air from combustion processes. The wide use of PCBs as dielectric and coolant fluids in the past has resulted in thier presence in the environment. FDA has has been monitoring specific foods with the goal of identifying ways to reduce dietary exposure to dioxin.
For more information:
Questions & Answers About Dioxins and Food Safety February 2012
Dioxin Analysis Results/Exposure Estimates June 2006; Updated November 2007